// // ViewController.m // UI1_UIView層操作 // // Created by zhangxueming on 15/7/1. // Copyright (c) 2015年 zhangxueming. All rights reserved. //#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];//self.view.backgroundColor=[UIColor cyanColor];// Do any additional setup after loading the view, typically from a nib.UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(10, 100, 320, 100)];redView.backgroundColor = [UIColor redColor];[self.view addSubview:redView];UIView *greenView = [[UIView alloc] initWithFrame:CGRectMake(20, 140, 320, 100)];greenView.backgroundColor = [UIColor greenColor];[self.view addSubview:greenView];UIView *yellowView = [[UIView alloc] initWithFrame:CGRectMake(30, 180, 320, 100)];yellowView.backgroundColor = [UIColor yellowColor];yellowView.alpha= 1.0;//值越大越不透明[self.view addSubview:yellowView];//先添加的視圖在self.view的最底層, 后添加的視圖在self.view的最頂層//父視圖 子視圖//獲取父視圖UIView *superView = [redView superview];superView.backgroundColor = [UIColor cyanColor];[yellowView superview].backgroundColor = [UIColor whiteColor];//獲取子視圖數組NSArray *subViews = [self.view subviews];((UIView *)[subViews objectAtIndex:0]).backgroundColor = [UIColor orangeColor];NSLog(@"count = %li", subViews.count);//把子視圖移到最頂層顯示[self.view bringSubviewToFront:redView];//把子視圖移動到最底層顯示[self.view sendSubviewToBack:redView];UIView *insertView = [[UIView alloc] initWithFrame:CGRectMake(10, 160, 350, 100)];insertView.backgroundColor = [UIColor blueColor];//在指定下標位置增加視圖//[self.view insertSubview:insertView atIndex:1];//在指定視圖上層增加視圖//[self.view insertSubview:insertView aboveSubview:greenView];//在指定視圖下層增加視圖[self.view insertSubview:insertView belowSubview:greenView];//交換兩個位置的視圖[self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:3];self.view.backgroundColor=[UIColor cyanColor];//[self.view removeFromSuperview];if([self.view superview]){NSLog(@"23");} }- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated. }@end

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轉載于:https://www.cnblogs.com/0515offer/p/4638432.html

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