常用方法
- (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));
*/
}];
}
make.size.mas_equalTo(CGSizeMake(40, 40));
- (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__)))
///* 居中
make.size.mas_equalTo(CGSizeMake(100, 60));
make.centerY.equalTo(view.superview.mas_centerY);
make.centerX.equalTo(view.superview.mas_centerX);
// */
make.width.equalTo(v1.mas_width);
make.height.equalTo(v1.mas_height);
//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);
//与v1的x中心点在同一直线
make.centerX.equalTo(v1.mas_centerX);
- (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);
}];
}
- (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;
}];
}
}