一开始我用的方法一写，但是后来发现在高系统上报错（大概报错内容：NSCocoaErrorDomain：257）。
后来解决了，做个记录。
1、在低于iOS13的系统中。用创建文件夹的形式可以如下：
+ (NSString *)tmpLogPath
{
NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library"];
NSString *dirPath = [docPath stringByAppendingPathComponent:@"mylog"];
NSString *filePath = [dirPath stringByAppendingPathComponent:@"tmpLog.txt"];
return filePath;
}
+ (void)writeTmpLog:(NSString *)aMsg
{
NSString *filePath = [[self class] tmpLogPath];
if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
BOOL isDir = NO;
BOOL hasDir = [[NSFileManager defaultManager] fileExistsAtPath:filePath isDirectory:&isDir];
if (!hasDir || !isDir) {
[[NSFileManager defaultManager] createDirectoryAtPath:filePath withIntermediateDirectories:NO attributes:nil error:nil];
}
}
NSError *error;
NSString *content =[NSString stringWithContentsOfFile:filePath
encoding:NSUTF8StringEncoding
error:&error];
NSString *newContent = [NSString stringWithFormat:@"%@\n%@",content,aMsg];
[newContent writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
+ (void)clearTmpLog
{
NSString *filePath = [[self class] tmpLogPath];
[@"" writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
2、但是在iOS13上，不能这样写。系统会默认创建以为***.txt的文件夹，在写入的时候就出问题了。
会报错：NSCocoaErrorDomain：257 就是
NSFileReadNoPermissionError = 257,/ /读取错误(权限问题)
所以可以这样写：
+ (NSString *)tmpLogPath {
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [documentPath stringByAppendingPathComponent:@"mylog/tmpLog.txt"];
returnfilePath;
}
+ (void)writeTmpLog:(NSString*)aMsg {
NSString*fieldPath = [[self class]tmpLogPath];
NSLog(@"当前文件大小：%llu",[self fileSizeWithPath:fieldPath]);
NSFileManager *manager = [NSFileManager defaultManager];
if(![managerfileExistsAtPath:fieldPath]){
NSError*error;
[aMsgwriteToFile:fieldPath atomically:YES encoding:NSUTF8StringEncoding error:&error];
if(error) {
NSLog(@"写入失败:%@\n",[error localizedDescription]);
}
}else{
NSError*error;
NSError*writeError;
NSString *content =[NSString stringWithContentsOfFile:fieldPath
encoding:NSUTF8StringEncoding
error:&error];
if(error) {
NSLog(@"读取失败:%@\n",[error localizedDescription]);
}
NSString*newContent = [NSString stringWithFormat:@"%@\n%@",content,aMsg];
[newContentwriteToFile:fieldPath atomically:YES encoding:NSUTF8StringEncoding error:&writeError];
if(writeError) {
NSLog(@"写入失败:%@\n",[writeErrorlocalizedDescription]);
}
}
}
//获取文件大小
+ (unsignedlonglong)fileSizeWithPath:(NSString*)path {
signedlonglongfileSize =0;
NSFileManager *fileManager = [NSFileManager defaultManager];
if([fileManagerfileExistsAtPath:path]) {
NSError*error =nil;
NSDictionary*fileDict = [fileManagerattributesOfItemAtPath:patherror:&error];
if(!error && fileDict) {
fileSize = [fileDictfileSize];
}
}
returnfileSize;
}
+ (void)clearTmpLog {
NSError*error;
NSFileManager *manager = [NSFileManager defaultManager];
NSString*filePath = [[selfclass]tmpLogPath];
[managerremoveItemAtPath:filePatherror:&error];
if(error) {
NSLog(@"删除失败:%@\n",[error localizedDescription]);
}
}
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