//
//  UIImageView+XHURLDownload.h
//  XHImageViewer
//
//  Created by 曾 宪华 on 14-2-18.
//  Copyright (c) 2014年 曾宪华 开发团队(http://iyilunba.com ) 本人QQ:543413507 本人QQ群（142557668）. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSInteger, UIImageViewURLDownloadState) {
    UIImageViewURLDownloadStateUnknown = 0,
    UIImageViewURLDownloadStateLoaded,
    UIImageViewURLDownloadStateWaitingForLoad,
    UIImageViewURLDownloadStateNowLoading,
    UIImageViewURLDownloadStateFailed,
};

@interface UIImageView (XHURLDownload)

// url
@property (nonatomic, strong) NSURL *url;

// download state
@property (nonatomic, readonly) UIImageViewURLDownloadState loadingState;

// UI
@property (nonatomic, strong) UIView *loadingView;
// Set UIActivityIndicatorView as loadingView
- (void)setDefaultLoadingView;

// instancetype
+ (id)imageViewWithURL:(NSURL*)url autoLoading:(BOOL)autoLoading;

// Get instance that has UIActivityIndicatorView as loadingView by default
+ (id)indicatorImageView;
+ (id)indicatorImageViewWithURL:(NSURL*)url autoLoading:(BOOL)autoLoading;

// Download
- (void)setUrl:(NSURL *)url autoLoading:(BOOL)autoLoading;
- (void)load;
- (void)loadWithURL:(NSURL *)url;
- (void)loadWithURL:(NSURL*)url completionBlock:(void(^)(UIImage *image, NSURL *url, NSError *error))handler;


@end