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https://github.com/wu736139669/UIImageView-Reload.git
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wu736139669
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//
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// UIImageView＋Reloading.h
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// XiaoYu
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// 可以显示进度，还可以失败重新下载
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// Created by xmfish on 14-8-21.
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// Copyright (c) 2014年 Benson. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#import "UIImageView+WebCache.h"
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typedef NS_ENUM(NSInteger, LKImageViewStatus){
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LKImageViewStatusNone = 0,
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LKImageViewStatusLoaded = 1,
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LKImageViewStatusLoading = 2,
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LKImageViewStatusFail = 3
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};
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@interface UIImageView(Reloading)
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//加载的图片 url地址 可以是 NSString 或 NSURL
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@property(copy, nonatomic) id imageURL;
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//这个不会设置 image 只会保存ImageURL
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- (void)setImageURLFromCache:(id)imageURL;
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//当前状态
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@property LKImageViewStatus status;
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//图片点击事件 不用再手动添加UITapGestureRecognizer
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@property(copy, nonatomic) void(^onTouchTapBlock)(UIImageView *imageView);
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//重新加载图片
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- (void)reloadImageURL;
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@end
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//
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// UIImageView＋Reloading.m
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// XiaoYu
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//
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// Created by xmfish on 14-8-21.
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// Copyright (c) 2014年 Benson. All rights reserved.
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//
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#import "UIImageView+Reloading.h"
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#import <execinfo.h>
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#import <objc/runtime.h>
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#import <objc/message.h>
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@implementation NSObject (Swizzle)
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+ (BOOL)jr_swizzleMethod:(SEL)origSel_ withMethod:(SEL)altSel_ error:(NSError**)error_ {
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Method origMethod = class_getInstanceMethod(self, origSel_);
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if (!origMethod) {
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return NO;
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}
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Method altMethod = class_getInstanceMethod(self, altSel_);
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if (!altMethod) {
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return NO;
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}
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class_addMethod(self,
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origSel_,
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class_getMethodImplementation(self, origSel_),
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method_getTypeEncoding(origMethod));
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class_addMethod(self,
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altSel_,
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class_getMethodImplementation(self, altSel_),
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method_getTypeEncoding(altMethod));
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method_exchangeImplementations(class_getInstanceMethod(self, origSel_), class_getInstanceMethod(self, altSel_));
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return YES;
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}
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+ (BOOL)jr_swizzleClassMethod:(SEL)origSel_ withClassMethod:(SEL)altSel_ error:(NSError**)error_ {
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return [object_getClass((id)self) jr_swizzleMethod:origSel_ withMethod:altSel_ error:error_];
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}
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@end
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static char imageURLKey;
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static char imageStatusKey;
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static char imageTapEventKey;
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static char imageOriginalModelKey;
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@implementation UIImageView (SY)
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+ (void)load
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{
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[UIImageView jr_swizzleMethod:@selector(cancelCurrentImageLoad) withMethod:@selector(sy_cancelCurrentImageLoad) error:nil];
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}
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- (UIButton *)sy_progressView:(BOOL)isCreate
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{
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static char imageProgressKey;
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UIButton *progressView = objc_getAssociatedObject(self, &imageProgressKey);
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if (isCreate)
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{
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if (progressView == nil)
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{
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progressView = [UIButton buttonWithType:UIButtonTypeCustom];
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progressView.frame = self.bounds;
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progressView.hidden = YES;
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progressView.backgroundColor = [UIColor clearColor];
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[progressView setTitle:@"点击加载图片" forState:UIControlStateNormal];
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[progressView setTitle:@"图片加载中" forState:UIControlStateDisabled];
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progressView.titleLabel.shadowColor = [UIColor whiteColor];
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progressView.titleLabel.shadowOffset = CGSizeMake(1, 1);
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[progressView setTitleColor:[UIColor lightGrayColor] forState:UIControlStateNormal];
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[progressView setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
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progressView.titleLabel.adjustsFontSizeToFitWidth = YES;
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CGSize size = CGSizeMake(progressView.frame.size.width,2000);
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CGSize labelsize = [progressView.titleLabel.text sizeWithFont:progressView.titleLabel.font constrainedToSize:size lineBreakMode:NSLineBreakByCharWrapping];
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progressView.frame = CGRectMake(0.0, 0.0, labelsize.width, labelsize.height);
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progressView.center = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);
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[progressView addTarget:self action:@selector(reloadImageURL) forControlEvents:UIControlEventTouchUpInside];
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progressView.enabled = NO;
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objc_setAssociatedObject(self, &imageProgressKey, progressView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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__weak UIImageView* wself = self;
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dispatch_async(dispatch_get_main_queue(), ^{
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[wself addSubview:progressView];
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});
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}
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return progressView;
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}
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- (UIViewContentMode)originalViewContentMode
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{
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NSNumber *value = objc_getAssociatedObject(self, &imageOriginalModelKey);
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int mode = -1;
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if (value)
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{
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mode = [value intValue];
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}
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if (mode < 0 || mode > UIViewContentModeBottomRight)
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{
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return -1;
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}
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else
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{
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return mode;
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}
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}
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- (void)setOriginalViewContentMode:(UIViewContentMode)originalViewContentMode
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{
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NSNumber *value = [[NSNumber alloc] initWithInt:originalViewContentMode];
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objc_setAssociatedObject(self, &imageOriginalModelKey, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (LKImageViewStatus)status
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{
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NSNumber *value = objc_getAssociatedObject(self, &imageStatusKey);
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if (value)
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{
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return [value intValue];
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}
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return LKImageViewStatusNone;
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}
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- (void)setStatus:(LKImageViewStatus)status
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{
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objc_setAssociatedObject(self, &imageStatusKey, @(status), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (void)setImageURLFromCache:(id)imageURL
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{
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[self sy_loadTapEvent];
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self.status = LKImageViewStatusLoaded;
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objc_setAssociatedObject(self, &imageURLKey, imageURL, OBJC_ASSOCIATION_COPY_NONATOMIC);
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}
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- (void)setImageURL:(id)imageURL
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{
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[self sy_loadTapEvent];
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objc_setAssociatedObject(self, &imageURLKey, imageURL, OBJC_ASSOCIATION_COPY_NONATOMIC);
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if (imageURL)
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{
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[self reloadImageURL];
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}
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else
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{
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[self sy_cancelCurrentImageLoad];
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self.image = nil;
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self.backgroundColor = [UIColor colorWithRed:233/255.0 green:228/255.0 blue:223/255.0 alpha:1];
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self.status = LKImageViewStatusNone;
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UIButton *pv = [self sy_progressView:NO];
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[pv removeFromSuperview];
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}
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}
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- (void)sy_loadTapEvent
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{
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static char tapEventLoadedKey;
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id loaded = objc_getAssociatedObject(self, &tapEventLoadedKey);
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if (loaded == nil)
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{
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self.userInteractionEnabled = YES;
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UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sy_handleTapEvent:)];
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[self addGestureRecognizer:tap];
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objc_setAssociatedObject(self, &tapEventLoadedKey, @(YES), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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}
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- (id)imageURL
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{
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return objc_getAssociatedObject(self, &imageURLKey);
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}
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- (void)sy_cancelCurrentImageLoad
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{
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if (self.imageURL)
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{
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void *callstack[2];
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int frames = backtrace(callstack, 2);
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char **strs = backtrace_symbols(callstack, 2);
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NSString *func_name = nil;
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if (frames > 1 && strs && strs[1])
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{
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func_name = [NSString stringWithUTF8String:strs[1]];
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}
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free(strs);
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//如果从外部调用 cancelImageLoad 才进行扫尾工作
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if ([func_name rangeOfString:@"UIImageView(WebCache)"].length == 0)
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{
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UIButton *pv = [self sy_progressView:NO];
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// pv.hidden = YES;
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[pv removeFromSuperview];
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self.status = LKImageViewStatusNone;
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}
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}
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[self sy_cancelCurrentImageLoad];
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}
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- (void)reloadImageURL
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{
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id imageURL = self.imageURL;
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if ([imageURL isKindOfClass:[NSString class]])
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{
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if ([imageURL isEqualToString:@""] == NO)
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{
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imageURL = [NSURL URLWithString:imageURL];
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}
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}
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if ([imageURL isKindOfClass:[NSURL class]] == NO)
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{
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return;
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}
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[self sy_cancelCurrentImageLoad];
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self.image = nil;
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self.backgroundColor = [UIColor colorWithRed:233/255.0 green:228/255.0 blue:223/255.0 alpha:1];
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__weak UIImageView *wself = self;
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if([self originalViewContentMode] < 0){
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[self setOriginalViewContentMode:self.contentMode];
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}
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self.contentMode = UIViewContentModeScaleAspectFill;
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self.status = LKImageViewStatusLoading;
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__weak __block UIButton *pv = [self sy_progressView:YES];
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dispatch_async(dispatch_get_main_queue(), ^{
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pv.hidden = NO;
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pv.enabled = NO;
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});
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[self sd_setImageWithURL:imageURL placeholderImage:self.image options:SDWebImageRetryFailed progress:^(NSInteger receivedSize, NSInteger expectedSize) {
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float pvalue = MAX(0, MIN(1, receivedSize / (float) expectedSize));
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dispatch_async(dispatch_get_main_queue(), ^{
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// [pv.titleLabel setText:[NSString stringWithFormat:@"图片加载中%.1f %%",pvalue*100]];
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[pv setTitle:[NSString stringWithFormat:@"图片加载中%.1f %%",pvalue*100] forState:UIControlStateDisabled];
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pv.hidden = NO;
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});
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} completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
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if(!pv){
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pv = [wself sy_progressView:NO];
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}
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if (image)
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{
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pv.hidden = YES;
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dispatch_async(dispatch_get_main_queue(), ^{
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[pv removeFromSuperview];
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});
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if([wself originalViewContentMode]>=0){
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if(wself.contentMode != [wself originalViewContentMode]){
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wself.contentMode = [wself originalViewContentMode];
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[wself setNeedsDisplay];
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}
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}
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else if (wself.contentMode != UIViewContentModeScaleAspectFill)
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{
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wself.contentMode = UIViewContentModeScaleAspectFill;
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[wself setNeedsDisplay];
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}
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wself.status = LKImageViewStatusLoaded;
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wself.backgroundColor = [UIColor clearColor];
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[wself setOriginalViewContentMode:-1];
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}
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else
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{
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if (error)
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{
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wself.status = LKImageViewStatusFail;
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[wself setOriginalViewContentMode:-1];
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dispatch_async(dispatch_get_main_queue(), ^{
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pv.enabled = YES;
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});
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}
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}
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}];
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}
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- (void)setOnTouchTapBlock:(void (^)(UIImageView *))onTouchTapBlock
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{
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[self sy_loadTapEvent];
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objc_setAssociatedObject(self, &imageTapEventKey, onTouchTapBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
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}
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- (void (^)(UIImageView *))onTouchTapBlock
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{
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return objc_getAssociatedObject(self, &imageTapEventKey);
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}
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- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
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{
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if (self.imageURL && self.status != LKImageViewStatusFail && self.onTouchTapBlock == nil)
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{
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return NO;
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}
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if (self.status == LKImageViewStatusLoading || self.status == LKImageViewStatusFail) {
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UIButton* pv = [self sy_progressView:NO];
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if (self.status == LKImageViewStatusFail && [pv pointInside:[self convertPoint:point toView:pv] withEvent:event]) {
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return YES;
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}
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return NO;
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}
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return [super pointInside:point withEvent:event];
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}
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- (void)sy_handleTapEvent:(UITapGestureRecognizer *)sender
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{
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switch (self.status)
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{
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case LKImageViewStatusFail:
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[self reloadImageURL];
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break;
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default:
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if (self.onTouchTapBlock)
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{
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self.onTouchTapBlock(self);
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}
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break;
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}
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}
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@end
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Reference in New Issue
Block a user