常用方法

设置view的位置

- (void)initViews{

UIView *view = [UIView new];

[self.view addSubview:view];

[view mas_makeConstraints:^(MASConstraintMaker *make) {

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

/* 等价于

make.top.equalTo(sv).with.offset(10);

make.left.equalTo(sv).with.offset(10);

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

make.right.equalTo(sv).with.offset(-10);

*/

/* 也等价于

make.top.left.bottom.and.right.equalTo(sv).with.insets(UIEdgeInsetsMake(10, 10, 10, 10));

*/

}];

}

设置view的size

make.size.mas_equalTo(CGSizeMake(40, 40));

更新删除view的约束

- (NSArray *)mas_makeConstraints:(void(^)(MASConstraintMaker *make))block;

- (NSArray *)mas_updateConstraints:(void(^)(MASConstraintMaker *make))block;

- (NSArray *)mas_remakeConstraints:(void(^)(MASConstraintMaker *make))block;

/*

mas_makeConstraints 只负责新增约束 Autolayout不能同时存在两条针对于同一对象的约束 否则会报错

mas_updateConstraints 针对上面的情况 会更新在block中出现的约束 不会导致出现两个相同约束的情况

mas_remakeConstraints 则会清除之前的所有约束 仅保留最新的约束

三种函数善加利用 就可以应对各种情况了

*/

mas_equalTo()和equalTo()的区别

mas_equalTo支持的类型更多

#define mas_equalTo(...)                equalTo(MASBoxValue((__VA_ARGS__)))

#define mas_greaterThanOrEqualTo(...)    greaterThanOrEqualTo(MASBoxValue((__VA_ARGS__)))

#define mas_lessThanOrEqualTo(...)      lessThanOrEqualTo(MASBoxValue((__VA_ARGS__)))

#define mas_offset(...)                  valueOffset(MASBoxValue((__VA_ARGS__)))

一个view

居中

///* 居中

make.size.mas_equalTo(CGSizeMake(100, 60));

make.centerY.equalTo(view.superview.mas_centerY);

make.centerX.equalTo(view.superview.mas_centerX);

// */

多个view

大小相同

make.width.equalTo(v1.mas_width);

make.height.equalTo(v1.mas_height);

首尾相连

//与v2上下间距为10

make.bottom.mas_equalTo(v2.mas_top).offset(-10);

//与v1左右间距为10

make.left.equalTo(v1.mas_right).offset(10);

同一垂直中线

//与v1的x中心点在同一直线

make.centerX.equalTo(v1.mas_centerX);

示例

- (void)towView{

UIView *v1 = [UIView new];

v1.backgroundColor = [UIColor redColor];

[self.view addSubview:v1];

UIView *v2 = [UIView new];

v2.backgroundColor = [UIColor blackColor];

[self.view addSubview:v2];

[v1 mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(200, 120));

make.top.mas_equalTo(v1.superview).offset(74);

//与v2上下间距为10

make.bottom.mas_equalTo(v2.mas_top).offset(-10);

make.centerX.equalTo(v1.superview.mas_centerX);

}];

[v2 mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(250, 30));

make.centerX.equalTo(v1.mas_centerX);

/*和v1的宽高相等

make.width.equalTo(v1.mas_width);

make.height.equalTo(v1.mas_height);

//*/

make.top.mas_equalTo(v1.mas_bottom).offset(10);

make.bottom.mas_equalTo(v2.superview).offset(-10);

}];

}

九宫格排序

- (void)squaredUp{

NSMutableArray *array  =  [NSMutableArray array];

for (int i = 0; i<14; i++) {

[array addObject:[NSString stringWithFormat:@"%d",i]];

}

__block UIView *lastV = nil;

int list = 4;

int gap = 10;

for (int i = 0; i

UILabel *label = [UILabel new];

label.text = array[i];

[self.view addSubview:label];

label.textAlignment = NSTextAlignmentCenter;

label.backgroundColor = [UIColor magentaColor];

[label sizeToFit];

[label mas_makeConstraints:^(MASConstraintMaker *make) {

if (lastV) {

make.width.equalTo(lastV.mas_width);

}else

make.size.mas_equalTo(CGSizeMake((self.view.frame.size.width - gap*(list + 1))/list, 20));

if (i%list == 0) {

make.left.equalTo(label.superview).offset(gap);

}

else{

make.left.equalTo(lastV.mas_right).offset(gap);

}

if (i%list == (list -1)) {

make.right.equalTo(label.superview).offset(-gap);

}

int top = 64+(i/list+1)*gap+(i/list*label.frame.size.height);

make.top.equalTo(label.superview).offset(top);

lastV = label;

}];

}

}

不规则标签排序

参考：http://adad184.com/2014/09/28/use-masonry-to-quick-solve-autolayout/