ios 清除一個app的緩衝

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標籤:管理   迴圈   cancel   代碼   size   檔案夾   send   sar   child   

首先應該擷取緩衝路徑,然後計算緩衝的總大小,最後在利用for迴圈,逐個刪除快取檔案夾裡面的檔案

下面附上完整的代碼例子

//清除緩衝按鈕的點擊事件

- (void)putBufferBtnClicked:(UIButton *)btn{    

CGFloat size = [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSTemporaryDirectory()];       

NSString *message = size > 1 ? [NSString stringWithFormat:@"緩衝%.2fM, 刪除緩衝", size] : [NSString stringWithFormat:@"緩衝%.2fK, 刪除緩衝", size * 1024.0];        UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:message preferredStyle:(UIAlertControllerStyleAlert)];       

UIAlertAction *action = [UIAlertAction actionWithTitle:@"確定" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction *action) {               

         [self cleanCaches];           

}];       

UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:nil];   

[alert addAction:action];   

[alert addAction:cancel];   

[self showDetailViewController:alert sender:nil];}

// 計算目錄大小-

-(CGFloat)folderSizeAtPath:(NSString *)path{   

// 利用NSFileManager實現對檔案的管理   

NSFileManager *manager = [NSFileManager defaultManager];   

CGFloat size = 0;  

if ([manager fileExistsAtPath:path]) {       

// 擷取該目錄下的檔案,計算其大小       

NSArray *childrenFile = [manager subpathsAtPath:path];      

for (NSString *fileName in childrenFile) {           

NSString *absolutePath = [path stringByAppendingPathComponent:fileName];           

size += [manager attributesOfItemAtPath:absolutePath error:nil].fileSize;      

}       

// 將大小轉化為M      

return size / 1024.0 / 1024.0;  

}   

return 0;

}

// 根據路徑刪除檔案

- (void)cleanCaches:(NSString *)path{   

// 利用NSFileManager實現對檔案的管理   

NSFileManager *fileManager = [NSFileManager defaultManager];   

if ([fileManager fileExistsAtPath:path]) {       

// 擷取該路徑下面的檔案名稱       

NSArray *childrenFiles = [fileManager subpathsAtPath:path];      

for (NSString *fileName in childrenFiles) {           

// 拼接路徑           

NSString *absolutePath = [path stringByAppendingPathComponent:fileName];           

// 將檔案刪除           

[fileManager removeItemAtPath:absolutePath error:nil];       

}  

}

ios 清除一個app的緩衝

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