UILabel中心内容
这是我的代码：
UILabel *myLabel;
myLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 300, 480)];
myLabel.lineBreakMode = UILineBreakModeWordWrap;
myLabel.numberOfLines = 2; // 2 lines ; 0 - dynamical number of lines
myLabel.text = @"Please select at least one image category!";
myLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size: 24.0];
myLabel.center = CGPointMake(self.view.frame.size.width/2, self.view.frame.size.height/2);
myLabel.backgroundColor = [UIColor clearColor];
[self.view addSubview:myLabel];
[myLabel release];
我想知道是否可以将换行的文本居中，因为它与左侧对齐： 
Here's my code:
UILabel *myLabel;
myLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 300, 480)];
myLabel.lineBreakMode = UILineBreakModeWordWrap;
myLabel.numberOfLines = 2; // 2 lines ; 0 - dynamical number of lines
myLabel.text = @"Please select at least one image category!";
myLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size: 24.0];
myLabel.center = CGPointMake(self.view.frame.size.width/2, self.view.frame.size.height/2);
myLabel.backgroundColor = [UIColor clearColor];
[self.view addSubview:myLabel];
[myLabel release];
I was wondering if it is possible to center the wrapped text as it is alined to the left side:
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评论（3）
UITextAlignmentCenter是使文本居中的正确方法，但现在已被弃用。 - 查看此问题和答案。使用
NSTextAlignmentCenter 相反：这是在评论中提到的，只是让像我这样的新手清楚。
UITextAlignmentCenterwas the correct method to center the text, but is now depreciated. - see this question and answer.Use
NSTextAlignmentCenterinstead:This was mentioned in a comment, just making it clear for rookies like myself.
使用此：
UITextAlignmentCenter从 iOS 6 开始已弃用！Use this:
UITextAlignmentCenteris deprecated from iOS 6!