删除某个文件夹下的所有文件

//删除本地文件夹下保存的文件
NSFileManager *fileManager = [NSFileManager defaultManager];

NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];

NSString *dicrectoryPath = [docPath stringByAppendingPathComponent:@"Pic"];

NSArray *fileList = [[NSArray alloc] init];

//fileList便是包含有该文件夹下所有文件的文件名及文件夹名的数组

fileList = [fileManager contentsOfDirectoryAtPath:dicrectoryPath error:nil];

for (NSString *path in fileList) {

if ([path containsString:@"png"]) {

NSString *filePath = [dicrectoryPath stringByAppendingPathComponent:path];

BOOL result1 = [fileManager removeItemAtPath:filePath error:nil];

if (result1) {

NSLog(@"删除成功");

}

}
}
//创建文件 将图片保存到该路径下

NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

NSTimeInterval a=[dat timeIntervalSince1970]*1000;

NSString *timeString = [NSString stringWithFormat:@"%.0f", a];

NSFileManager *fileManager = [NSFileManager defaultManager];

NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];

NSString *dicrectoryPath = [docPath stringByAppendingPathComponent:@"Pic"];

NSString *filePath;

BOOL rel = [fileManager fileExistsAtPath:dicrectoryPath isDirectory:nil];

if (rel) {

NSLog(@"存在文件夹");

filePath = [dicrectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@%@.png", [[DataHandle shareDataHandle] getLocalData:USERID], timeString]];

} else {

NSLog(@"不存在文件夹");

NSError *error = nil;

BOOL result = [fileManager createDirectoryAtPath:dicrectoryPath withIntermediateDirectories:YES attributes:nil error:&error];

if (result) {

filePath = [dicrectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@%@.png", [[DataHandle shareDataHandle] getLocalData:USERID], timeString]];

}

}
[data writeToFile:filePath atomically:YES];