UI标签高度？

Question

我使用 IB 和以下代码设置了 uilabel：

// setup label
sv.text =  @"When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation."; 
sv.lineBreakMode = UILineBreakModeWordWrap; 
sv.numberOfLines = 0;
[sv sizeToFit];

我的问题是，如何获取 uilabel 高度？

Answer 1

试试这个......

            CGSize maximumSize1 = CGSizeMake(100, 9999);
            NSString *myString1 = @"When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.";
            UIFont *myFont1 = [UIFont boldSystemFontOfSize:14];//[UIFont fontWithName:@"Helvetica" size:14];


            UILabel *lbl_Title=[[UILabel alloc] init];
            lbl_Title.lineBreakMode=UILineBreakModeClip;
            CGSize myStringSize1 = [myString1 sizeWithFont:myFont1 
                                         constrainedToSize:maximumSize1 
                                             lineBreakMode:lbl_Title.lineBreakMode];
            lbl_Title.frame=CGRectMake(20, 10, myStringSize1.width, myStringSize1.height);
            lbl_Title.font=myFont1;
            //      lbl_Title.font=[UIFont boldSystemFontOfSize:14];
            lbl_Title.backgroundColor=[UIColor clearColor];
            lbl_Title.numberOfLines=100;
            lbl_Title.text=myString1;

Answer 2

以下任一方法都可以解决问题...

<ullabel>.frame.size.height
<uilabel>.bounds.size.height

使用 NSLog 来看看...

NSLog(@"%f", myLabel.bounds.size.height);
NSLog(@"%f", myLabel.frame.size.height);

Answer 3

检查边界属性。

sv.bounds.size.height