自己定制加载图片并加上转圈圈

////  HYBLoadImageView.h//  CloudShopping////  Created by ljy-335 on 14-8-1.//  Copyright (c) 2014年 uni2uni. All rights reserved.//#import <UIKit/UIKit.h>/*! * @brief 加载图片时，给图片加上转圈圈的状态，让用户知道图片未出现是因为网络不给力而造成的而不是没有图片 * @author huangyibiao */@interface HYBLoadImageView : UIImageView// default is showLoading- (id)initWithFrame:(CGRect)frame;- (id)initWithFrame:(CGRect)frame showLoading:(BOOL)showLoading;- (void)setImageWithURLString:(NSString *)urlString placeholder:(NSString *)placeholder;@end

////  HYBLoadImageView.m//  CloudShopping////  Created by ljy-335 on 14-8-1.//  Copyright (c) 2014年 uni2uni. All rights reserved.//#import "HYBLoadImageView.h"#import "ASIHTTPRequest.h"#import "HYBHttpRequestManager.h"#import "NSString+Common.h"#import "NSString+Encrypt.h"#import "NSFileManager+File.h"@interface HYBLoadImageView () <NSURLConnectionDataDelegate> {    UIImageView             *_networkStateAnimatingView;    BOOL                    _showLoading;    NSMutableData           *_downloadData;    NSURLConnection         *_urlConnection;}@property (nonatomic, copy) NSString *url;@end@implementation HYBLoadImageView- (id)initWithFrame:(CGRect)frame {    return [self initWithFrame:frame showLoading:YES];}- (id)initWithFrame:(CGRect)frame showLoading:(BOOL)showLoading {    if (self = [super initWithFrame:frame]) {        _showLoading = showLoading;        self.contentMode = UIViewContentModeScaleAspectFit;     }    return self;}- (void)setImageWithURLString:(NSString *)urlString placeholder:(NSString *)placeholder {    self.image = kImageWithName(placeholder);        NSString *url = [NSString stringWithFormat:@"%@", urlString];    if (url.length == 0) {        return;    }    self.url = url;        if ([[NSFileManager defaultManager] isFileExists:[self imageCachePath]]) {        if (![[NSFileManager defaultManager] isFile:[self imageCachePath] timeout:24 * 60 * 60]) {            NSData *data = [[NSData alloc] initWithContentsOfFile:[self imageCachePath]];            self.image = [UIImage imageWithData:data];            return;        }    }        _downloadData = [[NSMutableData alloc] init];    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:url]];    _urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];    [[HYBHttpRequestManager sharedRequestManager] addRequest:_urlConnection                                                     withKey:self.url.md5];    if (_showLoading) {        if (_networkStateAnimatingView == nil) {            CGRect frame = CGRectMake((self.frame.size.width - 22) / 2,                                      (self.frame.size.height - 22) / 2, 22, 22);            _networkStateAnimatingView = [HYBUIMaker imageViewWithFrame:frame];            [self addSubview:_networkStateAnimatingView];            NSMutableArray *imagesArray = [[NSMutableArray alloc] init];            for (int i = 1; i < 13; i++) {                NSString *imgName = [NSString stringWithFormat:@"%d.png", i];                UIImage *image = kImageWithName(imgName);                [imagesArray addObject:image];            }            _networkStateAnimatingView.animationImages = imagesArray;            _networkStateAnimatingView.animationRepeatCount = 0;            _networkStateAnimatingView.animationDuration = 1.0 / (13.0 / 8.0);        }        [_networkStateAnimatingView startAnimating];    }    return;}#pragma mark - NSURLConnectionDataDelegate- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {    [_downloadData setLength:0];    return;}- (void)connectionDidFinishLoading:(NSURLConnection *)connection {    [[HYBHttpRequestManager sharedRequestManager] removeRequestWithKey:self.url.md5];        self.image = [UIImage imageWithData:_downloadData];    self.alpha = 0;    [UIView animateWithDuration:0.5 animations:^{        self.alpha = 1;    }];    [_networkStateAnimatingView stopAnimating];    [_networkStateAnimatingView removeFromSuperview];    [_downloadData writeToFile:[self imageCachePath] atomically:YES];    return;}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {    [[HYBHttpRequestManager sharedRequestManager] removeRequestWithKey:self.url.md5];    [_networkStateAnimatingView stopAnimating];    [_networkStateAnimatingView removeFromSuperview];    return;}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {    [_downloadData appendData:data];    return;}#pragma mark - 获取图片缓存路径//- (NSString *)imageCachePath {   return [NSString stringWithFormat:@"%@/%@", [NSString imageCachePath], self.url.md5];}@end