1.實現父視圖半透明效果,子視圖不透明,在父視圖上設置:
myView.backgroundColor=[[UIColor blackColor] colorWithAlphaComponent:0.5];
2.實現半透明視圖覆蓋導航欄和狀態欄效果(只能將視圖添加到Window):
[[[UIApplication sharedApplication] keyWindow]addSubview:myView];
1.實現父視圖半透明效果,子視圖不透明,在父視圖上設置:
myView.backgroundColor=[[UIColor blackColor] colorWithAlphaComponent:0.5];
[[[UIApplication sharedApplication] keyWindow]addSubview:myView];