iOS開發從入門到精通--手動布局子視圖

標籤：

手動布局子視圖；
下面先看下，我們今天要實現的效果：

這裡我們預設用storyboard啟動：
首先我們要在白色的螢幕上面建立一個父視圖SuperView（藍色的背景）,在父視圖裡面建立四個小視圖（橘黃色的背景）
下面看代碼，
在SuperView.h檔案裡面：

#import <UIKit/UIKit.h>@interface SuperView : UIView{    UIView * _view01;    UIView * _view02;    UIView * _view03;    UIView * _view04;}//聲明建立視圖函數-(void) createSubViews;@end

在SuperView.m檔案裡面：

#import "SuperView.h"@interface SuperView ()@end@implementation SuperView-(void) createSubViews{    //左上方視圖    _view01 = [[UIView alloc] init];    _view01.frame=CGRectMake(0, 0, 40, 40);    //右上方視圖    _view02 = [[UIView alloc] init];    _view02.frame=CGRectMake(self.bounds.size.width-40, 0, 40, 40);    //右下角視圖    _view03 = [[UIView alloc] init];    _view03.frame=CGRectMake(self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);    //左下角視圖    _view04 = [[UIView alloc] init];    _view04.frame=CGRectMake(0, self.bounds.size.height-40, 40, 40);    _view01.backgroundColor=[UIColor orangeColor];    _view02.backgroundColor=[UIColor orangeColor];    _view03.backgroundColor=[UIColor orangeColor];    _view04.backgroundColor=[UIColor orangeColor];    [self addSubview:_view01];    [self addSubview:_view02];    [self addSubview:_view03];    [self addSubview:_view04];}//當需要重新布局時調用此函數//通過此函數重新設定子視圖的位置//手動調整子視圖的位置-(void)layoutSubviews{    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:1];    _view01.frame=CGRectMake(0, 0, 40, 40);    _view02.frame=CGRectMake(self.bounds.size.width-40, 0, 40, 40);    _view03.frame=CGRectMake(self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);    _view04.frame=CGRectMake(0, self.bounds.size.height-40, 40, 40);    [UIView commitAnimations];}@end

在 ViewController.m檔案裡面：

#import "ViewController.h"#import "SuperView.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    //建立一個父視圖    SuperView * sView = [[SuperView alloc]init];    sView.frame = CGRectMake(20, 20, 180, 280);    //父視圖調用函數建立四個小視圖    [sView createSubViews];    sView.backgroundColor = [UIColor blueColor];    [self.view addSubview:sView];    UIButton * btn01 = [UIButton buttonWithType:UIButtonTypeRoundedRect];    btn01.frame = CGRectMake(240, 480, 80, 40);    [btn01 setTitle:@"放大" forState:UIControlStateNormal];    [btn01 addTarget:self action:@selector(pressLarge) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn01];    UIButton * btn02 = [UIButton buttonWithType:UIButtonTypeRoundedRect];    btn02.frame = CGRectMake(240, 520, 80, 40);    [btn02 setTitle:@"縮小" forState:UIControlStateNormal];    [btn02 addTarget:self action:@selector(pressSmall) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn02];    sView.tag = 101;}//放大父視圖-(void) pressLarge{    SuperView * sView = (SuperView*)[self.view viewWithTag:101];    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:1];    sView.frame=CGRectMake(20, 20, 280, 400);    [UIView commitAnimations];}//縮小父視圖-(void) pressSmall{    SuperView * sView = (SuperView*)[self.view viewWithTag:101];    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:1];    sView.frame=CGRectMake(20, 20, 180, 280);    [UIView commitAnimations];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

以上代碼書寫完畢，就達到了上面視圖的效果，代碼沒有注釋太多，因為之前的代碼裡面注釋的很詳細，現在不一一注釋，具體可以看我之前的文章，謝謝！

iOS開發從入門到精通--手動布局子視圖