XCode：如何在文本字段上添加左右填充？
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XCode : How to Add Left and Right Padding on Text Field?
提问by Saint Robson
I have this .h code :
我有这个 .h 代码：
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@property (strong, nonatomic) IBOutlet UITextField *fieldEmail;
@property (strong, nonatomic) IBOutlet UITextField *fieldPassword;
@property (strong, nonatomic) IBOutlet UILabel *titleLogin;
- (IBAction)buttonRegister;
- (IBAction)buttonLogin;
- (IBAction)loginFacebook;
- (IBAction)loginTwitter;
@end
and this is my .m code :
这是我的 .m 代码：
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[_fieldEmail setFont:[UIFont fontWithName:@"ABeeZee-Regular" size:14]];
[_titleLogin setFont:[UIFont fontWithName:@"Raleway-ExtraLight" size:28]];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)buttonRegister {
}
- (IBAction)buttonLogin {
}
- (IBAction)loginFacebook {
}
- (IBAction)loginTwitter {
}
@end
now, what I want to do is to add padding on left and right of these 2 text fields : fieldEmailand fieldPasswordso it has some space because I put an image as background on both text fields.
现在，我想要做的是在左，右这两个文本字段添加填充：fieldEmail并fieldPassword因此具有一定的空间，因为我把图像作为这两个文本字段的背景。
I tried to add this code on my .m file under - (void)viewDidLoad:
我尝试将此代码添加到我的 .m 文件中- (void)viewDidLoad：
UIView *fieldEmail = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
[UITextField setLeftViewMode:UITextFieldViewModeAlways];
[UITextField setLeftView:fieldEmail];
but my XCode gave me this error message :
但我的 XCode 给了我这个错误信息：
no known class method for selector 'setLeftViewMode'
no known class method for selector 'setLeftView'
by the way, I'm using XCode 4.6.3. does this version have special code to add padding on text field? thank you.
顺便说一下，我使用的是 XCode 4.6.3。此版本是否有特殊代码可以在文本字段上添加填充？谢谢你。
回答by Mundi
leftViewModeand leftVieware properties of UITextField, not class methods. You need to assign them to instances.
leftViewMode和leftView是 的属性UITextField，而不是类方法。您需要将它们分配给实例。
yourTextField.leftViewMode = UITextFieldViewModeAlways;
yourTextField.leftView = fieldEmail;
