ios 自動佈局 Masonry的運用

#一、安裝

pod 'Masonry'

#二、引入頭部

#import "Masonry.h"

#三、demo

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    //添加兩個控件
    UIView *blueView = [[UIView alloc] init];
    blueView.backgroundColor = [UIColor blueColor];
    blueView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:blueView];

    UIView *redView = [[UIView alloc] init];
    redView.backgroundColor = [UIColor redColor];
    redView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:redView];

    //給藍色View設置約束
    [blueView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view.mas_left).offset(30);//和父view的左邊間距爲30;
        make.bottom.equalTo(self.view.mas_bottom).offset(-30);//和父view的底部間距爲30;
        make.right.equalTo(redView.mas_left).offset(-30);//和紅色view的間距爲30;
        make.height.mas_equalTo(50);//藍色view的高度爲50
    }];

    //給紅色View設置約束
    [redView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(self.view.mas_right).offset(-30);//和父view的右邊間距爲30;
        make.bottom.equalTo(blueView.mas_bottom);//和藍色view的底部對齊
        make.height.equalTo(blueView.mas_height);//和藍色view的高度相等
        make.width.equalTo(blueView.mas_width);//和藍色view的寬度相等
    }];
}

#四、效果圖
官方git地址：https://github.com/SnapKit/Masonry
參考文章
一、http://www.jianshu.com/p/d172131d24c9
二、http://www.mamicode.com/info-detail-470300.html