UIView-图层方法

//
//  ViewController.m
//  UIView-图层概念
//
//  Created by wangtouwang on 15/5/5.
//  Copyright (c) 2015年 wangtouwang. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@property(nonatomic,strong) UIView *viewA;
@property(nonatomic,strong) UIView *viewB;
@property(nonatomic,strong) UIView *viewC;

@end

@implementation ViewController
@synthesize viewA;
@synthesize viewB;
@synthesize viewC;

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    [self.navigationItem setTitle:@"图层概念"];
    
    UIButton *addBtn1 = [[UIButton alloc] initWithFrame:CGRectMake(10,70, 60, 30)];
    [addBtn1 setTitle:@"增加" forState:UIControlStateNormal];
    addBtn1.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn1 setBackgroundColor:[UIColor grayColor]];
    [addBtn1 addTarget:self action:@selector(addDract) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn1];
    
    UIButton *addBtn2 = [[UIButton alloc] initWithFrame:CGRectMake(80,70, 60, 30)];
    [addBtn2 setTitle:@"删除" forState:UIControlStateNormal];
    addBtn2.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn2 setBackgroundColor:[UIColor grayColor]];
    [addBtn2 addTarget:self action:@selector(removeDract) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn2];
    
    UIButton *addBtn3 = [[UIButton alloc] initWithFrame:CGRectMake(150,70, 60, 30)];
    [addBtn3 setTitle:@"叠加" forState:UIControlStateNormal];
    addBtn3.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn3 setBackgroundColor:[UIColor grayColor]];
    [addBtn3 addTarget:self action:@selector(addSecquece) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn3];
    
    UIButton *addBtn4 = [[UIButton alloc] initWithFrame:CGRectMake(220,70, 60, 30)];
    [addBtn4 setTitle:@"上移" forState:UIControlStateNormal];
    addBtn4.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn4 setBackgroundColor:[UIColor grayColor]];
    [addBtn4 addTarget:self action:@selector(forUpMove) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn4];
    
    UIButton *addBtn5 = [[UIButton alloc] initWithFrame:CGRectMake(290,70, 60, 30)];
    [addBtn5 setTitle:@"下移" forState:UIControlStateNormal];
    addBtn5.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn5 setBackgroundColor:[UIColor grayColor]];
    [addBtn5 addTarget:self action:@selector(forDownMove) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn5];
    
    UIButton *addBtn6 = [[UIButton alloc] initWithFrame:CGRectMake(10,120, 120, 30)];
    [addBtn6 setTitle:@"上下调换" forState:UIControlStateNormal];
    addBtn6.titleLabel.font=[UIFont systemFontOfSize:13.0f];
    [addBtn6 setBackgroundColor:[UIColor grayColor]];
    [addBtn6 addTarget:self action:@selector(upForDown) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addBtn6];
}

#pragma mark 增加图层
-(void)addDract{
    viewA= [[UIView alloc] initWithFrame:CGRectMake(100, 250, 150, 150)];
    viewA.backgroundColor=[UIColor greenColor];
     [self.view addSubview:viewA];
}
  
#pragma mark 删除图层
-(void)removeDract{
    [viewA removeFromSuperview];
}


#pragma mark 图层叠加顺序 先添加的在下面 后添加的在上面
-(void)addSecquece{
    viewB= [[UIView alloc] initWithFrame:CGRectMake(110, 260, 150, 150)];
    viewB.backgroundColor=[UIColor redColor];
    [self.view addSubview:viewB];
    
    viewC= [[UIView alloc] initWithFrame:CGRectMake(120, 270, 150, 150)];
    viewC.backgroundColor=[UIColor yellowColor];
    [self.view addSubview:viewC];
}

#pragma mark 图层向上移
-(void)forUpMove{
    [self.view bringSubviewToFront:viewA];
}


#pragma mark 图层向下移
-(void)forDownMove{
    [self.view sendSubviewToBack:viewA];
    
}

#pragma mark 上下调换
-(void)upForDown{
    NSInteger indexC= [[self.view subviews] indexOfObject:viewC];
    NSInteger indexA= [[self.view subviews] indexOfObject:viewA];
    [self.view exchangeSubviewAtIndex:indexC withSubviewAtIndex:indexA];
}


@end