- (void)viewDidLoad {

    [superviewDidLoad];

    方法一：

    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, 25,200)];

    label.text = @"即\n時\n編\n譯\n功\n能\n。";

    label.numberOfLines = [label.text length];

    [self.view addSubview:label];

    方法二：

    UIFont *font = [UIFont systemFontOfSize

CGSize sizeWord = [@"一"sizeWithFont:font constrainedToSize:CGSizeMake(100, 1000.0) lineBreakMode:UILineBreakModeWordWrap];

    CGFloat width = sizeWord.width;//一個漢字的寬度

CGSize sizeStr = [@"是一個小巧的指令碼語言。"sizeWithFont:font constrainedToSize:CGSizeMake(width, 1000.0) lineBreakMode:UILineBreakModeWordWrap];

    CGFloat hight = sizeStr.height;

    UILabel *labelTwo = [[UILabel alloc]initWithFrame:CGRectMake(50, 200, width, hight)];

    labelTwo.text = @"是一個小巧的指令碼語言。";

    labelTwo.textColor = [UIColor blackColor];

    labelTwo.numberOfLines = 0;

    [self.view addSubview:labelTwo];

    UIButton *button=[[UIButton

    button.titleLabel.font=[UIFont fontWithName:@"Helvetica" size:24];

    [button setTitle:@"其設計目的是為了嵌入應用程式中"forState:UIControlStateNormal];

    [button setTitleColor:[UIColorblackColor] forState:UIControlStateNormal];

    [button setTitleColor:[UIColorredColor] forState:UIControlStateHighlighted];

    button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;//換行模式自動換行

    button.titleLabel.numberOfLines = 0;

    [self.view addSubview:button];

}