Button一些注意事项小记

// 设置不同状态下按钮的背景颜色

[caosBtn setBackgroundImage:[UIImageimageWithColor:kTextBlueColorimageSize:CGSizeMake(10,90)]forState:UIControlStateHighlighted];

//给按钮加边框和圆角

 caosBtn.layer.borderWidth =0.5;

 caosBtn.layer.borderColor =kBtnBorderLineColor.CGColor;

 caosBtn.layer.cornerRadius =2;

// button上的title居左显示及距离左边30如何设置

 btn.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;

 btn.titleEdgeInsets = UIEdgeInsetsMake(0, 30, 0, 0);