Ios 目标C：创建不带填充的按钮

如何以编程方式创建圆形按钮，而无需像图像上那样填充

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您可以使用一些

层

属性将大纲添加到任何

UIView

（

UIButton

是

UIView

的子类）

目标-C

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.layer.borderWidth = 2.0;
button.layer.borderColor = [UIColor blueColor].CGColor;
button.layer.cornerRadius = 2.0;
[button setTitle:@"Outline Button" forState:UIControlStateNormal];

Swift

let button = UIButton(type: .System)
button.layer.borderWidth = 2.0
button.layer.borderColor = UIColor.blueColor().CGColor
button.layer.cornerRadius = 2.0
button.setTitle("Outline Button", forState: .Normal)

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首先我想说的是，即使他给出了圆角的关键点，上面的答案也没有给出精确的答案

如果你想在没有填充的情况下得到圆角，如上图所示，我们主要应该选择CALayer

您必须首先导入Quartzcore框架。在上面的回答中，他没有提到这一点

 #import <QuartzCore/QuartzCore.h>

UIButton *btnRoundedCorner = [UIButton buttonWithType:UIButtonTypeCustom];
       OR
UIButton *btnRoundedCorner= [UIButton buttonWithType:UIButtonTypeSystem];
btnRoundedCorner.frame = CGRectMake(20, 60, 150, 100);
[btnRoundedCorner setTitle:@"Outline Button" forState:UIControlStateNormal];
[btnRoundedCorner setTitleColor:[UIColor  redColor] forState: UIControlStateNormal];
UIImage *image = [UIImage imageNamed:@"YourImageName"]; //If you want to set the image set here
//If you want to add or set Background image for button
[btnRoundedCorner setBackgroundImage:image forState:UIControlStateNormal];
//If you want to add or set image for button
[btnRoundedCorner setImage:image forState:UIControlStateNormal];
[btnRoundedCorner addTarget:self action:@selector(actionForRoundedCorner:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btnRoundedCorner];


//Rounded Corner
btnRoundedCorner.layer.cornerRadius = 2;
btnRoundedCorner.layer.borderWidth = 1;
btnRoundedCorner.layer.borderColor = [UIColor blueColor].CGColor;
btnRoundedCorner.layer.masksToBounds = YES;