【Coding】【7】iOS系统方式分享文件

本文最后更新于：2021年12月22日 上午

【Coding】系列目录

实现效果

效果

代码实现

BYShareFileHelper.h

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/// 导出文件，以下方法都会以fileName为标识进行操作
/// @param triggerVC vc
/// @param sourceView view
/// @param fileName 文件名，若需要后缀，需要自己拼接在fileName中
+ (void)shareFileInVC:(UIViewController * _Nullable)triggerVC sourceView:(UIView *)sourceView fileName:(NSString *)fileName;

+ (void)writeFile:(NSString *)fileName withInfo:(NSString *)info;
+ (void)writeFile:(NSString *)fileName withAutoTimePrefixInfo:(NSString *)info;

+ (void)appendWriteFile:(NSString *)fileName withInfo:(NSString *)info;
+ (void)appendWriteFile:(NSString *)fileName withAutoTimePrefixInfo:(NSString *)info;

BYShareFileHelper.m

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#pragma mark - Public method
+ (void)shareFileInVC:(UIViewController * _Nullable)triggerVC sourceView:(UIView *)sourceView fileName:(NSString *)fileName {
    _s_fileName = fileName;
    NSString *filePath = [self filePath];
    NSURL *fileUrl = [NSURL fileURLWithPath:filePath];
    UIActivityViewController *activity = [[UIActivityViewController alloc] initWithActivityItems:@[fileUrl] applicationActivities:nil];
    
    if (triggerVC == nil) {
        triggerVC = [UIApplication sharedApplication].keyWindow.rootViewController;
    }
    
    UIPopoverPresentationController *popover = activity.popoverPresentationController;
    
    if (popover) {
        popover.sourceView = sourceView;
        popover.permittedArrowDirections = UIPopoverArrowDirectionUp;
    }
    
    [triggerVC presentViewController:activity animated:YES completion:NULL];
}

+ (void)writeFile:(NSString *)fileName withAutoTimePrefixInfo:(NSString *)info {
    _s_fileName = fileName;
    NSDateFormatter *formatter = [self timeFormatter];
    NSString *str = [NSString stringWithFormat:@"%@ : %@\r\n",[formatter stringFromDate:[NSDate date]], info];
    [self writeFile:fileName withInfo:str];
}

+ (void)writeFile:(NSString *)fileName withInfo:(NSString *)info {
    _s_fileName = fileName;
    NSData *data = [info dataUsingEncoding:NSUTF8StringEncoding];
    [data writeToFile:self.filePath atomically:YES];
}

+ (void)appendWriteFile:(NSString *)fileName withAutoTimePrefixInfo:(NSString *)info {
    _s_fileName = fileName;
    NSDateFormatter *formatter = [self timeFormatter];
    NSString *str = [NSString stringWithFormat:@"%@ : %@\r\n",[formatter stringFromDate:[NSDate date]], info];
    [self appendWriteFile:fileName withInfo:str];
}

+ (void)appendWriteFile:(NSString *)fileName withInfo:(NSString *)info {
    _s_fileName = fileName;
    NSData *data = [info dataUsingEncoding:NSUTF8StringEncoding];
    [self.sharedFileHandle writeData:data];
}

#pragma mark - Getter
static NSString *_s_fileName = nil;
static NSString *_s_filePath = nil;

+ (NSString *)filePath {
    
    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    //取得第一个Documents文件夹的路径
    NSString *documentPath = [pathArray objectAtIndex:0];
    NSString *directPath = [documentPath stringByAppendingPathComponent:@"BYFile"];
    _s_filePath = [directPath stringByAppendingPathComponent:_s_fileName];
    if (![[NSFileManager defaultManager] fileExistsAtPath:_s_filePath]) {
        BOOL suc = [[NSFileManager defaultManager] createDirectoryAtPath:directPath withIntermediateDirectories:YES attributes:nil error:nil];
        NSLog(@"Create directPath %@ %@",directPath, suc?@"success":@"fail");
        suc = [[NSFileManager defaultManager] createFileAtPath:_s_filePath contents:nil attributes:nil];
        NSLog(@"Create file %@ %@",_s_filePath, suc?@"success":@"fail");
    }
    return _s_filePath;
}

static NSFileHandle *_s_fileHandle = nil;
+ (NSFileHandle *)sharedFileHandle {
    
    NSString *filePath = [self filePath];
    _s_fileHandle = [NSFileHandle fileHandleForWritingAtPath:filePath];
    [_s_fileHandle seekToEndOfFile];
    
    return _s_fileHandle;
}

static NSDateFormatter *_s_yMdHmsFormatter = nil;

+ (NSDateFormatter *)timeFormatter {
    if (_s_yMdHmsFormatter == nil) {
        _s_yMdHmsFormatter = [[NSDateFormatter alloc] init];
        _s_yMdHmsFormatter.dateFormat = @"yyyy.MM.dd HH:mm:ss:SSS";
    }
    return _s_yMdHmsFormatter;
}

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