prefersStatusBarHidden
titleEdgeInsets
UIBarButtonItem appearanceWhenContainedIn:
UIBarButtonItem setTitleTextAttributes:<#(NSDictionary )#> forState:<#(UIControlState)#>
NSMutableAttributedString
uiview.contentmode=uiviewcontentmodecenter
nsclassformstring
layer.contentsGravity = kCAGravityBottom
[self performSelector:_cmd withObject:alayer afterDelay:0.1];(定時遞歸調(diào)用)
[[[UIApplication sharedApplication] keyWindow] endEditing:YES];UITapGestureRecognizer singleRecognizer;
singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(SingleTap：)];
//點擊的次數(shù)
singleTapRecognizer.numberOfTapsRequired = 1; // 單擊
//給self.view添加一個手勢監(jiān)測；
[self.view addGestureRecognizer:singleRecognizer];
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
- (CGPoint)convertPoint:(CGPoint)point toView:(nullable UIView *)view;
- (CGPoint)convertPoint:(CGPoint)point fromView:(nullable UIView *)view;
- (CGRect)convertRect:(CGRect)rect toView:(nullable UIView *)view;
- (CGRect)convertRect:(CGRect)rect fromView:(nullable UIView *)view;
