//
// UIImageView+CacheURL.m
// Vodka
//
// Created by xiaoming on 15/11/5.
// Copyright © 2015年 Beijing Beast Technology Co.,Ltd. All rights reserved.
//
#import "UIImageView+CacheURL.h"
#import "CodeFragments.h"
@implementation UIImageView (CacheURL)
#pragma mark - 传人urlString 和默认图。获取网络图片。----不放到缓存里面
-(void)setURLString:(NSString *)urlString placeholderImage:(UIImage *)image{
[selfsetURLString:urlString placeholderImage:image relativePath:nil];
}
#pragma mark - 传人urlString 和默认图。获取网络图片。----不放到缓存里面 relativePath 传 nil @"" 跟上面的方法一样，都是 tempCache 路径下。
-(void)setURLString:(NSString *)urlString placeholderImage:(UIImage *)defaultImage relativePath:(NSString *)relativePath{
if (relativePath == nil || [relativePath isEqualToString:@""]) {
relativePath = @"tempCache";
}
self.image = defaultImage;
if ([self isEmptyString:urlString]) {
return;
}
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
UIImage *resultImage = nil;///从网上获取成功后的image
//从缓存中读取。
resultImage = [UIImage imageWithContentsOfFile:[self absolutePath:relativePath urlString:urlString systemPath:nil]];
if (resultImage) {
dispatch_async(dispatch_get_main_queue(), ^{
self.image = resultImage;
});
return;
}
///没有缓存的情况下。
NSURL *url = [NSURL URLWithString:urlString];
NSData *resultData = [NSData dataWithContentsOfURL:url];
resultImage = [UIImage imageWithData:resultData];
if (resultImage) {
///缓存data数据。
NSString *aFileName = [self absolutePath:relativePath urlString:nil systemPath:nil];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:aFileName]) {
////withIntermediateDirectories YES 表示可以创建多级目录。
if (![fileManager createDirectoryAtPath:aFileName withIntermediateDirectories:YESattributes:nilerror:nil]) {
NSLog(@"createFile error occurred");
}
}
NSString *resultFileString = [self absolutePath:relativePath urlString:urlString systemPath:nil];
if ([resultData writeToFile:resultFileString atomically:YES]) {
NSLog(@"保存成功");
}else{
NSLog(@"保存失败");
}
dispatch_async(dispatch_get_main_queue(), ^{
self.image = resultImage;
});
}
});
}
#pragma mark - 判断是否是空字符串
- (BOOL)isEmptyString:(NSString *)string{
if(string == nil){
return YES;
}
if([string isKindOfClass:[[NSNull null] class]]){
return YES;
}
if([string isEqualToString:@""]){
return YES;
}
if([string isEqualToString:@"<null>"])
return YES;
if([string isEqualToString:@"(null)"])
return YES;
returnNO;
}
#pragma mark - 从本地文件读取数据。
-(NSString *)absolutePath:(NSString*)relativePath urlString:(NSString *)urlString systemPath:(NSString *)systemPath{
if (relativePath == nil || [relativePath isEqualToString:@""]) {
relativePath = @"tempCache";
}
NSString *path0 = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path1 = [path0 stringByAppendingPathComponent:relativePath];
if(urlString && ![urlString isEqualToString:@""]){///创建路径的时候不需要url，读，取的时候，需要url。
NSString *path2 = [path1 stringByAppendingPathComponent:[urlString stringByReplacingOccurrencesOfString:@"/"withString:@"_"]];
return path2;
}
return path1;
}
#pragma mark - 清除本地缓存
-(void)cleanDisk{
NSFileManager *fileManager = [NSFileManagerdefaultManager];
NSString *path0 = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *defaultPath = [NSString stringWithFormat:@"%@/tempCache",path0];
NSLog(@"defaultPaht ==== %@",defaultPath);
[self folderSizeAtPath:defaultPath];
if ([fileManager removeItemAtPath:defaultPath error:nil]) {
NSLog(@"删除成功");
}else{
NSLog(@"删除失败");
}
[self folderSizeAtPath:defaultPath];
}
#pragma mark - 通常用于删除缓存的时，计算缓存大小
//单个文件的大小
- (long long) fileSizeAtPath:(NSString*) filePath{
NSFileManager* manager = [NSFileManagerdefaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}
#pragma mark - 遍历文件夹获得文件夹大小，返回多少M
- (float ) folderSizeAtPath:(NSString*) folderPath{
if (!folderPath || [folderPath isEqualToString:@""]) {
NSString *path0 = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
folderPath = [NSString stringWithFormat:@"%@/tempCache",path0];
}
NSFileManager* manager = [NSFileManagerdefaultManager];
if (![manager fileExistsAtPath:folderPath])
{
NSLog(@"大小为0");
return 0;
}
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
NSString* fileName;
long long folderSize = 0;
while ((fileName = [childFilesEnumerator nextObject]) != nil){
NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
folderSize += [self fileSizeAtPath:fileAbsolutePath];
}
NSLog(@"文件大小====%f M ",folderSize/(1024.0*1024.0));
return folderSize/(1024.0*1024.0);
}
@end