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ZoomImageView.m
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ZoomImageView.m
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//
// ZoomImageView.m
// WeiChi
//
// Created by imac on 15/9/16.
// Copyright (c) 2015年 imac. All rights reserved.
//
#import "ZoomImageView.h"
#import "MBProgressHUD.h"
#import "UIImage+GIF.h"
@implementation ZoomImageView{
NSURLConnection *_connection;
double _length;
NSMutableData *_data;
MBProgressHUD *_hud;
}
-(instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if(self){
[self _initTap];
[self _createGif];
}
return self;
}
-(instancetype)initWithCoder:(NSCoder *)aDecoder{
self = [super initWithCoder:aDecoder];
if(self){
[self _initTap];
[self _createGif];
}
return self;
}
-(instancetype)initWithImage:(UIImage *)image{
self = [super initWithImage:image];
if(self){
[self _initTap];
[self _createGif];
}
return self;
}
-(void)_initTap{
//打开交互
self.userInteractionEnabled = YES;
//创建单击手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(zoomIn)];
[self addGestureRecognizer:tap];
//imageView 图片显示模式 保持比例
self.contentMode = UIViewContentModeScaleAspectFit;
}
-(void)_createGif{
//判断gif
_iconView = [[UIImageView alloc]initWithFrame:CGRectZero];
_iconView.hidden=YES;
_iconView.image = [UIImage imageNamed:@"timeline_gif.png"];
[self addSubview:_iconView];
}
-(void)zoomIn{
if([self.delegate respondsToSelector:@selector(imageWillZoomIn:)]){
[self.delegate imageWillZoomIn:self];
}
self.hidden = YES;
//创建大图浏览的_scrollView
[self _createView];
//计算_fullImageView的frame
//把自己相对于父视图的frame 转换成相对于window的frame
CGRect frame = [self convertRect:self.bounds toView:self.window];
_fullImageView.frame = frame;
//添加动画 放大
[UIView animateWithDuration:0.3 animations:^{
_fullImageView.frame=_scrollView.frame;
} completion:^(BOOL finished){
_fullImageView.backgroundColor = [UIColor blackColor];
[self _downLoadImage];
}];
}
-(void)_downLoadImage{
//请求网络 下载原图片
if(self.fullImageUrlString.length > 0){
//进度显示
if(_hud == nil){
_hud = [MBProgressHUD showHUDAddedTo:_scrollView animated:YES];
}
_hud.mode = MBProgressHUDModeDeterminate;
_hud.progress = 0.0;
NSURL *url = [NSURL URLWithString:_fullImageUrlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:30];
_connection = [NSURLConnection connectionWithRequest:request delegate:self];
}
}
-(void)zoomOut{
if([self.delegate respondsToSelector:@selector(imageWillZoomOut:)]){
[self.delegate imageWillZoomOut:self];
}
//取消网络下载
[_connection cancel];
self.hidden = NO;
_fullImageView.backgroundColor = [UIColor clearColor];
[UIView animateWithDuration:0.3 animations:^{
CGRect frame = [self convertRect:self.bounds toView:self.window];
_fullImageView.frame = frame;
//如果scroll内容已经便宜,则偏移量也得计算
_fullImageView.top += _scrollView.contentOffset.y;
} completion:^(BOOL finished){
[_scrollView removeFromSuperview];
_scrollView = nil;
_fullImageView = nil;
_hud = nil;
}];
}
-(void)_createView{
if(_scrollView == nil){
//创建scrollView添加到window
_scrollView = [[UIScrollView alloc]initWithFrame:[UIScreen mainScreen].bounds];
_scrollView.showsHorizontalScrollIndicator=NO;
_scrollView.showsVerticalScrollIndicator = NO;
[self.window addSubview:_scrollView];
//创建大图 fullImageView
_fullImageView = [[UIImageView alloc]initWithFrame:CGRectZero];
_fullImageView.contentMode = UIViewContentModeScaleAspectFit;
_fullImageView.image = self.image;
[_scrollView addSubview:_fullImageView];
//添加缩小手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(zoomOut)];
[_scrollView addGestureRecognizer:tap];
//长按 保存
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(savePhoto:)];
[_scrollView addGestureRecognizer:longPress];
}
}
-(void)savePhoto:(UILongPressGestureRecognizer *)longPress{
//
if(longPress.state == UIGestureRecognizerStateBegan){
//淡出提示框
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"是否保存图片" delegate:self cancelButtonTitle:@"否" otherButtonTitles:@"是", nil];
[alert show];
}
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex == 1){
UIImage *img = _fullImageView.image;
//将大图片保存到相册
UIImageWriteToSavedPhotosAlbum(img,self,@selector(image:didFinishSavingWithError:contextInfo:),nil);
}
}
//保存成功调用
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
//提示保存成
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.window animated:YES];
hud.customView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"37x-Checkmark.png"]];
//显示模式改为:自定义视图模式
hud.mode = MBProgressHUDModeCustomView;
hud.labelText = @"保存成功";
//延迟隐藏
[hud hide:YES afterDelay:1.5];
}
#pragma mark - 网络下载
//服务器响应请求
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
//1 取得响应头
NSDictionary *headerFields = [httpResponse allHeaderFields];
//2 获取文件大小
NSString *lengthStr = [headerFields objectForKey:@"Content-Length"];
_length = [lengthStr doubleValue];
_data = [[NSMutableData alloc]init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[_data appendData:data];
CGFloat progress = _data.length/_length;
_hud.progress =progress;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
[_hud hide:YES];
UIImage *image = [UIImage imageWithData:_data];
_fullImageView.image = image;
//尺寸处理
CGFloat length = image.size.height/image.size.width * kScreenWidth;
if(length > kScreenHeight){
[UIView animateWithDuration:0.3 animations:^{
_fullImageView.height = length;
_scrollView.contentSize = CGSizeMake(kScreenWidth, length);
}];
}
[self gifImageShow];
}
-(void)gifImageShow{
// //
// UIWebView *webView = [[UIWebView alloc]initWithFrame:_scrollView.bounds];
//
// webView.userInteractionEnabled = NO;
// webView.scalesPageToFit= YES;
//
// [webView loadData:_data MIMEType:@"image/gif" textEncodingName:nil baseURL:nil];
//
// [_scrollView addSubview:webView];
_fullImageView.image = [UIImage sd_animatedGIFWithData:_data];
}
@end