- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
}
return self;
}
- (void)layoutSubviews
{
[super layoutSubviews];
}
凡是子控件跟frame相关的要在- (void)layoutSubviews;里写
@implementation Btn
// 自定义按钮的frame方法
- (instancetype)initWithFrame:(CGRect)frame isShow:(BOOL)isShow
{
if (self = [super initWithFrame:frame]) {
self.titleLabel.textAlignment = NSTextAlignmentRight;
// 字体不分状态
self.titleLabel.font = [UIFont systemFontOfSize:14];
self.titleLabel.lineBreakMode = NSLineBreakByTruncatingTail;
[self setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
self.backgroundColor = [UIColor greenColor];
self.isTest = isShow;
}
return self ;
}
- (void)update:(BOOL)isTest{
self.isTest = isTest;
//调用这句，改变布局
[self setNeedsLayout];
}
- (void)layoutSubviews
{
[super layoutSubviews];
CGFloat buttonW = self.frame.size.width;
CGFloat buttonH = self.frame.size.height;
CGFloat imageW = 0;
if (self.isTest){
imageW = 20;
}
self.titleLabel.frame = CGRectMake(0, 0,buttonW - imageW + 5, buttonH);
self.imageView.frame = CGRectMake(self.titleLabel.frame.size.width - 5, (buttonH - imageW) / 2, imageW, imageW);
}
