我如何设置一个UIButton的标题为左对齐?

我需要在UIButton的左侧显示一个电子邮件地址，但它被定位到中心。

有什么方法来设置对齐到UIButton的左边?

这是我当前的代码:

UIButton* emailBtn = [[UIButton alloc] initWithFrame:CGRectMake(5,30,250,height+15)];
emailBtn.backgroundColor = [UIColor clearColor];
[emailBtn setTitle:obj2.customerEmail forState:UIControlStateNormal];
emailBtn.titleLabel.font = [UIFont systemFontOfSize:12.5];
[emailBtn setTitleColor:[[[UIColor alloc]initWithRed:0.121 green:0.472 blue:0.823 alpha:1]autorelease] forState:UIControlStateNormal];
[emailBtn addTarget:self action:@selector(emailAction:) forControlEvents:UIControlEventTouchUpInside];
[elementView addSubview:emailBtn];
[emailBtn release];

当前回答

下面解释一下如何做到这一点以及为什么它是这样的: http://cocoathings.blogspot.com/2013/03/how-to-make-uibutton-text-left-or-right.html

2013-03-06 17:02:52

其他回答

设置contentthorizontalalign:

// Swift 
emailBtn.contentHorizontalAlignment = .left;

// Objective-C
emailBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

你可能还想调整内容的左插入，否则文本将触及左边框:

// Swift 3 and up:
emailBtn.contentEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0);

// Objective-C
emailBtn.contentEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);

2010-05-04 12:22:49

@DyingCactus的代码有一个小错误。下面是正确的解决方案，添加一个UILabel到UIButton来对齐按钮文本，以更好地控制按钮的“标题”:

NSString *myLabelText = @"Hello World";
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];

// position in the parent view and set the size of the button
myButton.frame = CGRectMake(myX, myY, myWidth, myHeight); 

CGRect myButtonRect = myButton.bounds;
UILabel *myLabel = [[UILabel alloc] initWithFrame: myButtonRect];   
myLabel.text = myLabelText;
myLabel.backgroundColor = [UIColor clearColor];
myLabel.textColor = [UIColor redColor]; 
myLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:14.0];   
myLabel.textAlignment = UITextAlignmentLeft;

[myButton addSubview:myLabel];
[myLabel release];

希望这有助于....

2011-01-03 22:59:43

迅捷用户界面

你应该改变应用于文本的.frame修饰符的对齐属性。另外，将多行文本对齐设置为.leading。

Button {
    // handler for tapping on the button
} label: {
    Text("Label")
        .frame(width: 200, alignment: .leading)
        .multilineTextAlignment(.leading)
}

2021-07-13 08:00:16

下面解释一下如何做到这一点以及为什么它是这样的: http://cocoathings.blogspot.com/2013/03/how-to-make-uibutton-text-left-or-right.html

2013-03-06 17:02:52

在Swift 5.0和Xcode 10.2中

有两种方法

1)直接方法

btn.contentHorizontalAlignment = .left

2) SharedClass示例(编写一次，然后使用每个ware)

这是您的共享类(像这样您可以访问所有组件属性)

import UIKit

class SharedClass: NSObject {

    static let sharedInstance = SharedClass()

    private override init() {

    }
}

//UIButton extension
extension UIButton {
    func btnProperties() {
        contentHorizontalAlignment = .left
    }
}

在你的ViewController调用中

button.btnProperties()//This is your button

2019-04-29 05:10:30

我如何设置一个UIButton的标题为左对齐?

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