移动开发iOS之如何在UI界面实现视图的交替

首先，在IOS中建立一个Single View Application；

在创建一个类Cocoa Touch Class，继承于ViewController类；

在ViewController写：

#import “ViewController.h”

#import “NextViewController.h”

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor blackColor];

//模态视图推送

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];

button.translatesAutoresizingMaskIntoConstraints = NO;

[button setTitle:@”推送” forState:0];

[button addTarget:self action:@selector(pushAction:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

//给按钮添加约束来布局，即相当于frame的功能：

NSLayoutConstraint *constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterX multiplier:1 constant:0];

[self.view addConstraint:constraint];

constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterY multiplier:1 constant:0];
[self.view addConstraint:constraint];

constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:60];
[self.view addConstraint:constraint];

constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:30];
[self.view addConstraint:constraint];

-(void)pushAction:(UIButton *)sender{

NextViewController *nextViewController = [[NextViewController alloc] init];

//模态视图过度动画

nextViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

[self presentViewController:nextViewController animated:YES completion:^{

}];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}

@end

在新建的类中这么写：

#import “ViewController.h”

@interface NextViewController : ViewController

@end

#import “NextViewController.h”

@interface NextViewController ()

@end

@implementation NextViewController

- (void)viewDidLoad {

self.view.backgroundColor = [UIColor redColor];

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.translatesAutoresizingMaskIntoConstraints = NO;
[button setTitle:@"返回" forState:0];
[button addTarget:self action:@selector(popAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];

NSLayoutConstraint *constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterX multiplier:1 constant:0];
[self.view addConstraint:constraint];

constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterY multiplier:1 constant:0];
[self.view addConstraint:constraint];

constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:60];
[self.view addConstraint:constraint];
constraint = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:30];
[self.view addConstraint:constraint]；

}

-(void)popAction:(UIButton *)sender{

[self dismissViewControllerAnimated:YES completion:nil];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end