iOS:为什么带有 setCornerRadius 的 UITextField 会截断文本

Question

我正在尝试将带有圆角的 UITextField 加载到 iOS 的表格 View 中。在大多数情况下，一切都运行良好。但是，由于角半径属性，最左边的字符会被部分截断。有没有办法在输入到 UITextField 的文本上设置边距，以便它正确显示？这是我的代码:

        textInput = [[UITextField alloc] init];
        textInput.backgroundColor = [UIColor whiteColor];
        textInput.placeholder = @"example@gmail.com";
        textInput.textColor = [UIColor blackColor];
        textInput.keyboardType = UIKeyboardTypeEmailAddress;
        textInput.returnKeyType = UIReturnKeyDone;

        [[textInput layer] setBorderColor:[[UIColor whiteColor] CGColor]];
        [[textInput layer] setBorderWidth:2.3];
        [[textInput layer] setCornerRadius:15];
        [textInput setClipsToBounds: YES];
        [textInput setDelegate:self];

    [self.contentView addSubview:textInput];
        [textInput release];

Answer 1

我想出了一个解决办法。我创建了一个自定义文本字段，它是 UITextField 的子类:

#import "CR_customTextField.h"

@implementation CR_customTextField

- (CGRect)textRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + margin, bounds.origin.y, bounds.size.width - margin, bounds.size.height);
    return inset;
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + margin, bounds.origin.y, bounds.size.width - margin, bounds.size.height);
    return inset;
}

@end