Masonry是用代码实现自动布局的第三方框架。
使用之前首先要导入框架，以下是具体的代码实现。
1.中心点与父视图相同
#import "ViewController.h"#import "Masonry.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; // [self setView1];
// [self setView2];
//[self setView3];
[self setView4];}/** * 中心点与父视图相同 */-(void)setView1{ UIView *mainView = [[UIView alloc] init]; mainView.backgroundColor = [UIColor redColor]; [self.view addSubview:mainView]; [mainView mas_makeConstraints:^(MASConstraintMaker *make) { make.center.equalTo(self.view); make.size.mas_equalTo(CGSizeMake(200, 200)); }];}
2.距离上下左右边距
/** * 距离上下左右边距 */-(void)setView2{ UIView *mainView = [[UIView alloc] init]; mainView.backgroundColor = [UIColor redColor]; [self.view addSubview:mainView]; [mainView mas_makeConstraints:^(MASConstraintMaker *make) { //make.edges.equalTo(self.view).with.insets(UIEdgeInsetsMake(100, 80, 50, 10)); make.left.equalTo(self.view).with.offset(10); make.right.equalTo(self.view).with.offset(-20); make.top.equalTo(self.view).with.offset(30); make.bottom.equalTo(self.view).with.offset(-40); }];
3.两个视图左右排开间距是10
-(void)setView3{ //左边视图 UIView *rightView = [[UIView alloc] init]; rightView.backgroundColor = [UIColor redColor]; [self.view addSubview:rightView]; //右边视图 UIView *leftView1 = [[UIView alloc] init]; leftView1.backgroundColor = [UIColor greenColor]; [self.view addSubview:leftView1]; [rightView mas_makeConstraints:^(MASConstraintMaker *make) { make.centerY.mas_equalTo(self.view.mas_centerY); make.height.mas_equalTo(150); make.width.mas_equalTo(leftView1.mas_width); make.left.mas_equalTo(self.view.mas_left).with.offset(10); make.right.mas_equalTo(leftView1.mas_left).with.offset(-10); }]; [leftView1 mas_makeConstraints:^(MASConstraintMaker *make) { make.centerY.mas_equalTo(self.view.mas_centerY); make.height.mas_equalTo(150); make.width.mas_equalTo(rightView.mas_width); make.left.mas_equalTo(rightView.mas_right).with.offset(10); make.right.mas_equalTo(self.view.mas_right).with.offset(-10); }];}
4.登录界面
-(void)setView4{ UITextField *accountTextField = [[UITextField alloc] init]; accountTextField.backgroundColor = [UIColor redColor]; accountTextField.placeholder = @"账号"; [self.view addSubview:accountTextField]; UITextField *secretTextField = [[UITextField alloc] init]; secretTextField.backgroundColor = [UIColor greenColor]; secretTextField.placeholder = @"密码"; [self.view addSubview:secretTextField]; UIButton *loginButton = [[UIButton alloc] init]; loginButton.backgroundColor = [UIColor blueColor]; [loginButton setTitle:@"登录" forState:UIControlStateNormal]; [self.view addSubview:loginButton]; [accountTextField mas_makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(self.view.mas_left).offset(50); make.right.equalTo(self.view.mas_right).offset(-50); make.top.equalTo(self.view.mas_top).offset(100); make.height.mas_equalTo(50); }]; [secretTextField mas_makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(self.view.mas_left).offset(50); make.right.equalTo(self.view.mas_right).offset(-50); make.top.equalTo(accountTextField.mas_bottom).offset(40); make.height.mas_equalTo(50); }]; [loginButton mas_makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(self.view.mas_left).offset(100); make.right.equalTo(self.view.mas_right).offset(-100); make.top.equalTo(secretTextField.mas_bottom).offset(40); make.height.mas_equalTo(50); }]; } 以下为源码连接地址：http://pan.baidu.com/s/1eRnfs8i