iOS  UI一些设置方法

1：如何设置背景透明       lbl.backgroundColor=[UIColorclearColor]; 
2：如何设置UIViewControl的frame属性   myViewControl.view.frame = CGRectMake(0, 0, 320 ,100); 
3：分别获得  CGRect中的4个属性值（viewframe）      view.frame.origin.x, frame.origin.y, frame.size.width,frame.size.height 
4：如何用代码添加事件：   [button addTarget:self action:@selector(buttonClicked)forControlEvents:UIControlEventTouchUpInside]; 
5:设置UIButton的自定义样式风格：　　　　在属性栏，选择Type=custon 
6：OS4使用自定义动画，以及动画完成后自动调用方法 
[UIView animateWithDuration:0.5 delay:0options:UIViewAnimationTransitionCurlUp animations:^{ [UIViewsetAnimationTransition:UIViewAnimationTransitionCurlUpforView:self.view cache:YES]; // [delegate ContentView_UnLoad]; //self.view.center = CGPointMake(self.view.center.x,self.view.center.y+480.0); } completion:^(BOOL finished){ if(finished){ [self unLoadMe]; //[delegate ContentView_UnLoad]; } }]; 
　　　　　　　　　 
7：，当页面跳转时，使用系统自带动画：   
//当前页  被跳转页 
nContentView=[[UserNewsContentView alloc]initWithNibName:@"UserNewsContentView" bundle:nil SetTypeID:typeStrSetTitleID:titleStr]; [self presentModalViewController:nContentViewanimated:YES]; 
//跳转页 
-(IBAction)btnContent_click:(id)sender{ 
    [selfdismissModalViewControllerAnimated:YES]; 
} 
　　　　　　　　　　　　 　　 
8:时间戳转换为日期： 
NSDate* dat = [NSDatedateWithTimeIntervalSince1970:1319939453]; 

9：日期转换是星期几：NSDateComponents *weekdayComponents = [[NSCalendarcurrentCalendar] components:NSWeekdayCalendarUnit fromDate:dat];int weekday = [weekdayComponents weekday]; NSLog(@"%d",weekday);NSLog(@"%@",dat); 

10:请问怎么查看一个view得superview？      [view.superview description] 


// [((AppDelegate *)[UIApplicationsharedApplication].delegate).window.rootViewControllerdismissModalViewControllerAnimated:YES]; [((AppDelegate*)[UIApplication sharedApplication].delegate).menuViewControllerdismissModalViewControllerAnimated:YES];//[self.presentingViewController.presentingViewControllerdismissModalViewControllerAnimated:NO]; 

11： 
利用QuartzCore为UIView视图添加border以及圆角 
2011年04月20日 星期三 16:26 
首先引入QuartzCore/QuartzCore.h到类中 
然后如下使用: 

UITextView*yourTextView=[[UITextView alloc]initWithFrame:CGRectMake(0,200,200,100)]; 
[yourTextView.layer setBackgroundColor: [[UIColor whiteColor]CGColor]]; 
   [yourTextView.layer setBorderColor:[[UIColorgrayColor]CGColor]]; 
   [yourTextView.layersetBorderWidth:1.0]; 
   [yourTextView.layersetCornerRadius:8.0f]; 
   [yourTextView.layersetMasksToBounds:YES]; 

12遍历一个View的子视图并且删除 
for (UIView *oneView in ViewBody.subviews ){             
       [oneView removeFromSuperview]; 
   }