IOS自适应库－－－- Masonry的使用

Masonry是一个轻量级的布局框架，拥有自己的描述语法，采用更优雅的链式语法封装自动布局，简洁明了并具有高可读性，而且同时支持 iOS 和 Max OS X。Masonry是一个用代码写iOS或OS界面的库，可以代替Auto layout。Masonry的github地址：https://github.com/SnapKit/Masonry

以下将从三个方面介绍如下：

- Masonry配置 - Masonry使用 - Masonry实例

1 Masonry配置

- 推荐使用pods方式引入类库，pod 'Masonry'，若不知道pod如何使用，可参考文章：提高ios开发效率的工具

然后 - 引入头文件 #import "Masonry.h"即可。

Masonry使用讲解

mas_makeConstraints 是给view添加约束，约束有几种，分别是边距，宽，高，左上右下距离，基准线。添加过约束后可以有修正，修正有offset（位移）修正和multipliedBy（倍率）修正。

语法一般是 make.equalTo or make.greaterThanOrEqualTo or make.lessThanOrEqualTo + 倍数和位移修正。

注意点1：使用 mas_makeConstraints方法的元素必须事先添加到父元素的中，例如[self.view addSubview:view];

注意点2： mas_equalTo 和 equalTo 区别：mas_equalTo 比equalTo多了类型转换操作，一般来说，大多数时候两个方法都是通用的，但是对于数值元素使用mas_equalTo。对于对象或是多个属性的处理，使用equalTo。特别是多个属性时，必须使用equalTo,例如 make.left.and.right.equalTo(self.view);

注意点3: 注意到方法with和and,这连个方法其实没有做任何操作，方法只是返回对象本身,这个方法的左右完全是为了方法写的时候的可读性。make.left.and.right.equalTo(self.view);和make.left.right.equalTo(self.view);是完全一样的，但是明显的加了and方法的语句可读性更好点。

Masonry初级使用例子

// exp1: 中心点与self.view相同，宽度为100*400 300*200

-(void)exp1{

UIView *view = [UIView new];

[view setBackgroundColor:[UIColor redColor]];

[self.view addSubview:view];

[view mas_makeConstraints:^(MASConstraintMaker *make) {

make.center.equalTo(self.view);

make.size.mas_equalTo(CGSizeMake(100,400));

}];

UIView *view1=[UIView new];

[view1 setBackgroundColor:[UIColor blackColor]];

[self.view addSubview:view1];

[view1 mas_makeConstraints:^(MASConstraintMaker *make) {

make.center.equalTo(self.view);

make.size.mas_equalTo(CGSizeMake(300, 200));

}];

}

//exp2: 上下左右边距都为10

-(void)exp2{

UIView *view = [UIView new];

[view setBackgroundColor:[UIColor redColor]];

[self.view addSubview:view];

[view mas_makeConstraints:^(MASConstraintMaker *make) {

make.edges.equalTo(self.view).with.insets(UIEdgeInsetsMake(10, 10, 10, 10));

// make.top.equalTo(self.view).with.offset(10);

// make.left.equalTo(self.view).with.offset(10);

// make.bottom.equalTo(self.view).with.offset(-10);

// make.right.equalTo(self.view).with.offset(-10);

}];

}

//exp3 让两个高度为150的view垂直居中且等宽且等间隔排列间隔为10

-(void)exp3{

UIView *view1 = [UIView new];

[view1 setBackgroundColor:[UIColor blueColor]];

[self.view addSubview:view1];

UIView *view2 = [UIView new];

[view2 setBackgroundColor:[UIColor redColor]];

[self.view addSubview:view2];

[view1 mas_makeConstraints:^(MASConstraintMaker *make) {

make.centerY.mas_equalTo(self.view.mas_centerY);

make.height.mas_equalTo(150);

make.width.mas_equalTo(view2.mas_width);

make.left.mas_equalTo(self.view.mas_left).with.offset(10);

make.right.mas_equalTo(view2.mas_left).offset(-10);

}];

[view2 mas_makeConstraints:^(MASConstraintMaker *make) {

make.centerY.mas_equalTo(self.view.mas_centerY);

make.height.mas_equalTo(150);

make.width.mas_equalTo(view1.mas_width);

make.left.mas_equalTo(view1.mas_right).with.offset(10);

make.right.equalTo(self.view.mas_right).offset(-10);

}];

}

Masonry高级使用例子1

iOS计算器使用Masorny布局：

//高级布局练习 ios自带计算器布局

-(void)exp4{

//申明区域，displayView是显示区域，keyboardView是键盘区域

UIView *displayView = [UIView new];

[displayView setBackgroundColor:[UIColor blackColor]];

[self.view addSubview:displayView];

UIView *keyboardView = [UIView new];

[self.view addSubview:keyboardView];

//先按1：3分割 displView（显示结果区域）和 keyboardView（键盘区域）

[displayView mas_makeConstraints:^(MASConstraintMaker *make) {

make.top.equalTo(self.view.mas_top);

make.left.and.right.equalTo(self.view);

make.height.equalTo(keyboardView).multipliedBy(0.3f);

}];

[keyboardView mas_makeConstraints:^(MASConstraintMaker *make) {

make.top.equalTo(displayView.mas_bottom);

make.bottom.equalTo(self.view.mas_bottom);

make.left.and.right.equalTo(self.view);

}];

//设置显示位置的数字为0

UILabel *displayNum = [[UILabel alloc]init];

[displayView addSubview:displayNum];

displayNum.text = @"0";

displayNum.font = [UIFont fontWithName:@"HeiTi SC" size:70];

displayNum.textColor = [UIColor whiteColor];

displayNum.textAlignment = NSTextAlignmentRight;

[displayNum mas_makeConstraints:^(MASConstraintMaker *make) {

// make.left.and.right.equalTo(displayView).with.offset(-10);

// make.right.equalTo(displayView).with.offset(-10);

make.right.equalTo(self.view).offset(-10);

make.bottom.equalTo(displayView).with.offset(-10);

}];

//定义键盘键名称，？号代表合并的单元格

NSArray *keys = @[@"AC",@"+/-",@"%",@"÷"

,@"7",@"8",@"9",@"x"

,@"4",@"5",@"6",@"-"

,@"1",@"2",@"3",@"+"

,@"0",@"?",@".",@"="];

int indexOfKeys = 0;

for (NSString *key in keys){

//循环所有键

indexOfKeys++;

int rowNum = indexOfKeys %4 ==0? indexOfKeys/4:indexOfKeys/4 +1;

int colNum = indexOfKeys %4 ==0? 4 :indexOfKeys %4;

NSLog(@"index is:%d and row:%d,col:%d",indexOfKeys,rowNum,colNum);

//键样式

UIButton *keyView = [UIButton buttonWithType:UIButtonTypeCustom];

[keyboardView addSubview:keyView];

[keyView setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

[keyView setTitle:key forState:UIControlStateNormal];

[keyView.layer setBorderWidth:1];

[keyView.layer setBorderColor:[[UIColor blackColor]CGColor]];

[keyView.titleLabel setFont:[UIFont fontWithName:@"Arial-BoldItalicMT" size:30]];

//键约束

[keyView mas_makeConstraints:^(MASConstraintMaker *make) {

//处理 0 合并单元格

if([key isEqualToString:@"0"] || [key isEqualToString:@"?"] ){

if([key isEqualToString:@"0"]){

[keyView mas_makeConstraints:^(MASConstraintMaker *make) {

make.height.equalTo(keyboardView.mas_height).with.multipliedBy(.2f);

make.width.equalTo(keyboardView.mas_width).multipliedBy(.5);

make.left.equalTo(keyboardView.mas_left);

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.9f);

}];

}if([key isEqualToString:@"?"]){

[keyView removeFromSuperview];

}

//正常的单元格

else{

make.width.equalTo(keyboardView.mas_width).with.multipliedBy(.25f);

make.height.equalTo(keyboardView.mas_height).with.multipliedBy(.2f);

//按照行和列添加约束，这里添加行约束

switch (rowNum) {

case 1:

{

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.1f);

keyView.backgroundColor = [UIColor colorWithRed:205 green:205 blue:205 alpha:1];

}

break;

case 2:

{

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.3f);

}

break;

case 3:

{

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.5f);

}

break;

case 4:

{

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.7f);

}

break;

case 5:

{

make.baseline.equalTo(keyboardView.mas_baseline).with.multipliedBy(.9f);

}

break;

default:

break;

}

//按照行和列添加约束，这里添加列约束

switch (colNum) {

case 1:

{

make.left.equalTo(keyboardView.mas_left);

}

break;

case 2:

{

make.right.equalTo(keyboardView.mas_centerX);

}

break;

case 3:

{

make.left.equalTo(keyboardView.mas_centerX);

}

break;

case 4:

{

make.right.equalTo(keyboardView.mas_right);

[keyView setBackgroundColor:[UIColor colorWithRed:243 green:127 blue:38 alpha:1]];

}

break;

default:

break;

}

}];

}

本例子使用的baseline去控制高度位置，这似乎不是太准，如果想要精准控制高度位置，可以使用一行一行添加的方法，每次当前行的top去equelTo上一行的bottom。给个提示：

for（遍历所有行)

for（遍历所以列）

//当前行约束根据上一行去设置

posted @ 2015-12-05 18:18 yhj1787354782 阅读(265) 评论(0) 编辑收藏举报

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IOS自适应库－－－- Masonry的使用

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