使用外观添加填充到uitextfield

Question

我不想为了得到文本填充而继承UITextField类。

我想使用外观代理来做到这一点。

我尝试这样做：

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

不幸的是，如果我在我的应用程序委托把这段代码，有一个UITextField，用于它的任何视图控制器，无法加载视图

如何添加填充到文本字段而不进行子类化？

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; 
} 

（OR）

做这样

// 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"