相关疑难解决方法(0)

我知道如何设置按钮与IB的垂直对齐方式; 看到这里.但我不能以编程方式做到这一点......这是我尝试过的事情之一:

UIButton *button  = [[UIButton alloc] initWithFrame:CGRectMake(10, 10, 110, 130)];
[button setTitle:@"Align" forState:UIControlStateNormal];
button.backgroundColor = [UIColor whiteColor];
button.titleLabel.textColor = [UIColor grayColor];
[button setContentVerticalAlignment:UIControlContentVerticalAlignmentBottom];

[self.view addSubview:button];

[button release];

我也尝试了插图......

但是对齐不会改变.

请注意,我想保留按钮的CustomStyle(我不想要默认的外观).

我无法理解为什么在下面的代码中,标题对齐不是顶部.

UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn2.titleLabel.font = [UIFont systemFontOfSize:53];
btn2.frame = CGRectMake(20, 20, 270, 44);
[btn2 setTitle:@"test1 test2 test3 test4 test5 test6 test7" forState:UIControlStateNormal];
[btn2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
btn2.titleLabel.minimumFontSize = 1.0;
btn2.titleLabel.adjustsFontSizeToFitWidth = YES;
btn2.titleLabel.numberOfLines = 1;
btn2.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;