如何在UITextField中将用作leftView的UILabel与textField的文本垂直对齐？

问题描述

我使用 UILabel 作为 UITextField的 leftView 。问题是textField的文本高于标签的。

I'm using a UILabel as the leftView of a UITextField. The issue is that the textField's text is higher than the label's.

这是我到目前为止使用的代码

This is the code I've used so far

UILabel *startsWith = [[UILabel alloc] init];
startsWith.font = [UIFont systemFontOfSize:14];
startsWith.textColor = [UIColor blackColor];
startsWith.backgroundColor = [UIColor clearColor];
startsWith.text = @"Text";
[startsWith sizeToFit];
self.textField.leftViewMode = UITextFieldViewModeAlways;
self.textField.leftView = startsWith;

我尝试过略微改变标签的框架，但它不起作用......

I've tried slightly changing the label's frame but it didn't work...

如何对齐两个文本？

推荐答案

您可以创建容器视图你在其中定位 UILabel 1px。

You could create a container view in which you position the UILabel 1px up.

    UIView * v = [[UIView alloc] init];
    v.backgroundColor = [UIColor clearColor];

    UILabel *startsWith = [[UILabel alloc] init];
    startsWith.font = self.textfield.font;
    startsWith.textAlignment = self.textfield.textAlignment;
    startsWith.textColor = [UIColor blackColor];
    startsWith.backgroundColor = [UIColor clearColor];
    startsWith.text = @"Text";
    [startsWith sizeToFit];

    startsWith.frame = CGRectOffset(startsWith.frame, 0, -1);
    v.frame = startsWith.frame;
    [v addSubview:startsWith];
    self.textfield.leftViewMode = UITextFieldViewModeAlways;
    self.textfield.leftView = v;

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