如何根据标题文本增加UIButton高度？

Question

我需要根据标题增加UIButton的高度。

图片显示问题如下

Answer 1

这是完全测试的，因为你说动态高度

myButton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.titleLabel.numberOfLines=0;
myButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
NSString *titleOfButton=@"this is the very launch soon title here u can pass as long as big string";
[myButton setTitle:titleOfButton forState:UIControlStateNormal];
CGSize constraint1=CGSizeMake(150.0f, 5000.0f);
CGSize size1=[titleOfButton sizeWithFont:[UIFont systemFontOfSize:14.0f] constrainedToSize:constraint1 lineBreakMode:NSLineBreakByWordWrapping];
[myButton setFrame:CGRectMake(10,50,150, size1.height+20)];
[self.view addSubview:myButton];

Answer 2

使用此代码获取帮助

UIFont font = myButton.titleLabel.font;
CGSize textsize = [myButton.titleLabel.text sizeWithFont:font constrainedToSize:CGSizeMake(myButton.frame.size.width,999) lineBreakMode:UILineBreakModeTailTruncation]; 

[myButton setFrame:CGRectMake(myButton.frame.origin.x,myButton.frame.origin.y,myButton.frame.size.width, textsize.height)];