- (CGRect)textRectForBounds:(CGRect)未被调用的边界

Question

我试图在一个内部移动文本UITextField,使其垂直对齐正确.我在网上搜索过,所有内容都指向编辑这些方法:

- (CGRect) textRectForBounds:(CGRect)bounds

和

- (CGRect) editingRectForBounds:(CGRect)bounds

虽然我已经像这样编辑了它们:

- (CGRect) textRectForBounds:(CGRect)bounds {
    NSLog(@"hi");
    return CGRectInset(bounds, 10, 10);
}

虽然它没有进入nslog.

我也尝试在文本字段上调用该方法,但没有成功

这是我初始化文本视图并设置它们的方式:

-(void) viewWillAppear:(BOOL)animated {
    textfield1 = [[UITextField alloc] init];
    textfield2 = [[UITextField alloc] init];
    textfield3 = [[UITextField alloc] init];
    textfield4 = [[UITextField alloc] init];
    for (UITextField *text in [NSArray arrayWithObjects:textfield1, textfield2, textfield3, textfield4, nil]) {
        text.delegate = self;
        text.placeholder = [placeholders objectAtIndex:i];
        text.frame = CGRectMake(10, offsetTop, container.frame.size.width - 20, 40);
        [text textRectForBounds:text.bounds];
        [text editingRectForBounds:text.bounds];
        text.borderStyle = UITextBorderStyleRoundedRect;
        offsetTop += 50;
        i++;
        [container addSubview:text];
    }
}

Answer 1

第1步 - 首先创建自定义文本字段MyTextField

@interface MyTextField : UITextField

第2步 - 根据您的要求覆盖MyTextField方法

///place holder position

- (CGRect)placeholderRectForBounds:(CGRect)bounds
 {
   return CGRectInset(bounds, 8, 8);
 }
 // text position
 - (CGRect)textRectForBounds:(CGRect)bounds {

  return CGRectInset(bounds, 8,4);
 }

 // text position while editing
 - (CGRect)editingRectForBounds:(CGRect)bounds {

     return CGRectInset(bounds, 8, 4);
 }

步骤3-在您的控制器类中导入MyTextField并生成MyTextField的对象

#import "MyTextField.h"

-(void) viewWillAppear:(BOOL)animated {

    MyTextField* textfield1 = [[MyTextField alloc] init];
    // and so on

}

现在每个文本字段都将按预期工作.