qy1010

//获取当前时间
- (NSString *)currentDateStr{
    NSDate *currentDate = [NSDate date];//获取当前时间，日期
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];// 创建一个时间格式化对象
    [dateFormatter setDateFormat:@"YYYY/MM/dd hh:mm:ss SS "];//设定时间格式,这里可以设置成自己需要的格式
    NSString *dateString = [dateFormatter stringFromDate:currentDate];//将时间转化成字符串
    return dateString;
}

qy1010

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
            [target performSelector:selector];
#pragma clang diagnostic pop

qy1010

+ (void)checkCameraPermission:(void(^)(BOOL status))block
{
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];//读取设备授权状态
    if (authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied) {
        if (block) {
            block(NO);
        }
        return;
    }
    else if (authStatus == AVAuthorizationStatusNotDetermined) {

qy1010

//镂空效果
- (void)photoFadeout
{
    
    UIView *backgroundView = [[UIView alloc] init];
    backgroundView.frame = self.view.bounds;
    backgroundView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.7];
    [self.view addSubview:backgroundView];
    
    // 创卷一个全屏大Path

qy1010

- (void)addLineDashPattern:(UIView *)view
{
    [view.layer.sublayers enumerateObjectsUsingBlock:^(__kindof CALayer * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        [obj removeFromSuperlayer];
        obj = nil;
    }];
    
    view.layer.masksToBounds = YES;
    view.layer.cornerRadius = view.frame.size.width / 2;
    

qy1010

暂停:
 [timer setFireDate:[NSDate distantFuture]];

继续:
 [timer setFireDate:[NSDate date]];

qy1010

UIView *myView = [[UIView alloc] init];
myView.frame = CGRectMake(0, 0, 50, 50);
myView.backgroundColor = [UIColor blackColor];
[self.view addSubview:myView];

[UIView animateWithDuration:2.0 animations:^{
    // 2 秒内向右移动 100, 向下移动100。
    myView.transform = CGAffineTransformMakeTranslation(100, 100);
    
} completion:^(BOOL finished) {

qy1010

电池电量 Prefs:root=BATTERY_USAGE
通用设置 Prefs:root=General
存储空间 Prefs:root=General&path=STORAGE_ICLOUD_USAGE/DEVICE_STORAGE
蜂窝数据 Prefs:root=MOBILE_DATA_SETTINGS_ID
Wi-Fi 设置 Prefs:root=WIFI
蓝牙设置 Prefs:root=Bluetooth
定位设置 Prefs:root=Privacy&path=LOCATION
辅助功能 Prefs:root=General&path=ACCESSIBILITY
关于手机 Prefs:root=General&path=About
键盘设置 Prefs:root=General&path=Keyboard

qy1010

这个方法判断是否允许使用相册的回调
 [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
  if (status == PHAuthorizationStatusAuthorized) {
      //允许使用相册
  }else{
  //不允许使用相册
 }
  }];

PHAuthorizationStatus photoAuthorStatus = [PHPhotoLibrary authorizationStatus];

qy1010

#shell判断文件夹是否存在

#如果文件夹不存在，创建文件夹 //  /myfolder 根目录下是否有myfolder
if [ ! -d "/myfolder" ]; then
  mkdir /myfolder
fi

#shell判断文件,目录是否存在或者具有权限

folder="/var/www/"