ios - 使用外观向 uitextfield 添加填充

Question

我不想为了获得文本填充而子类化 UITextField 类。

我想用外观代理来做。

我试过这个:

UIView *padding = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 5, 2)];
[[UITextField appearance] setLeftView:padding];
[[UITextField appearance] setLeftViewMode:UITextFieldViewModeAlways];

不幸的是，如果我将此代码放入我的应用程序委托(delegate)中，任何包含 uitextfield 的 View Controller 都无法加载 View

如何在不对其进行子类化的情况下向文本字段添加填充？

Answer 1

Can you try these..

- (CGRect)textRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + bounds.size.width/2, bounds.origin.y, bounds.size.width/2 - margin, bounds.size.height);
    return inset;
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + bounds.size.width/2, bounds.origin.y, bounds.size.width/2 - margin, bounds.size.height);
    return inset;
}

(或)

这样做

// Do any additional setup after loading the view from its nib.

 UIView *paddingTxtfieldView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 20, 42)];// what ever you want 
 txtfield.leftView = paddingTxtfieldView;
 txtfield.leftViewMode = UITextFieldViewModeAlways;
 txtfield.returnKeyType = UIReturnKeyNext;// if you want to go next textfiled write this otherwise "UIReturnKeyDone"