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让iPhone屏幕常亮不变暗的方法
http://www.cocoachina.com/iphonedev/sdk/2010/0604/1624.html
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可以把一个view 多次 addsubview 到同一父view上,不过父上只存在一个这样的view;
UIView* v1 = [[UIView alloc] init];
UILabel* lb = [[UILabel alloc] init];
[v1 addSubview:lb];
NSLog(@"%@", [v1 subviews]);
[v1 addSubview:lb];
TTDPRINT(@"%@", [v1 subviews]);
[lb release];
[v1 release];
可以把一个view先后加到不同的 父view上,不过该view只存在后一父view上:
UIView* v1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 30)];
UIView* v2 = [[UIView alloc] initWithFrame:CGRectMake(50, 0, 100, 30)];
[self.view addSubview:v1];
[self.view addSubview:v2];
UILabel* lb = [[UILabel alloc] init];
lb.text = @"12";
[lb sizeToFit];
[v1 addSubview:lb];
TTDPRINT(@"%@", [v1 subviews]);
[v2 addSubview:lb];
TTDPRINT(@"%@", [v1 subviews]);
TTDPRINT(@"%@", [v2 subviews]);
[v1 release];
[v2 release];