UITextField自定义背景视图和转换文本 [英] UITextField custom background view and shifting text

问题描述

我正在尝试使用自定义文本字段背景.问题在于该文本在左侧似乎太靠近了.

I'm trying to use a custom textfield background. The problem is that the text then appears to be too close on the left.

在不继承UITextField的子类的情况下，我看不到任何移动文本的方法.所以我正在尝试扩展和覆盖

I don't see any way to shift the text without subclassing UITextField. So I'm attempting to extend and overwrite

- (void)drawTextInRect:(CGRect)rect{
    NSLog(@"draw rect");
    CGRect newRect = CGRectMake(rect.origin.x+20,rect.origin.y,rect.size.width-20,rect.size.height);    
    [super drawTextInRect:newRect]; 
}

但是由于某些原因，日志从不打印.我知道正在使用子类，因为我在init中也有一个日志，并且可以正常打印.

But for some reason the log never prints. I know the subclass is being used since I also have a log in the init, and that prints fine.

打开地面

编辑.

我也尝试

- (CGRect)textRectForBounds:(CGRect)bounds{
    NSLog(@"bounds");
    CGRect b = [super textRectForBounds:bounds];
    b.origin.x += 20;
    return b;
}

这实际上可以追溯，但似乎并没有改变

That actually traces, but it doesn't seem to be shifting

推荐答案

我认为您可以为此使用 leftView 属性.

I think you could use the leftView property for this.

您可以将 leftView 和 rightView 添加到UITextfield.这些视图可用于显示图标，但是如果为空视图，则仅会占用空间，这就是您想要的.

You can add a leftView and rightView to a UITextfield. These views can be used to display an icon, but if it's an empty view it'll just take up space, which is what you want.

CGFloat leftInset = 5.0f;
UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, leftInset, self.bounds.size.height)];
self.leftView = leftView;
self.leftViewMode = UITextFieldViewModeAlways;
[leftView release];

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