标签：style blog http color io os ar 使用 for
xcode 6.1
File-New-Project..
iOs-Application-Simple View Application
1、写一个自定义JSTextField类，继承UITextField,来重载原有的initWithFrame方法，以便以后可以重用。
1.1右键，弹的菜单New File...
1.2 iOS-Source-Cocoa Touch Class
1.3 在Class:中输入JSTextField(名字自取),让其继承UITextField:
1.4 Next =>Create 创建文件JSTextField.h JSTextField.m
1.5 点击JSTextField.h,输入方法：
代码：
-(id)initWithFrame:(CGRect)frame drawingLeft:(UIImageView*)icon;
1.6 打开JSTextField.m,实现initWithFrame方法，并且overwrite方法leftViewRectForBounds:,让图标右侧可以有点间距:
代码：
#import "JSTextField.h" @implementation JSTextField -(id)initWithFrame:(CGRect)frame drawingLeft:(UIImageView *)icon{ self = [super initWithFrame:frame]; if (self) { self.leftView = icon; self.leftViewMode = UITextFieldViewModeAlways; } return self; } -(CGRect)leftViewRectForBounds:(CGRect)bounds{ CGRect iconRect = [super leftViewRectForBounds:bounds]; iconRect.origin.x += 10;// 右偏10 return iconRect; } @end
2、使用刚才的JSTextField:
代码：
UIImage *usernameImage = [UIImage imageNamed:@"20.gif"]; UIImageView *usernameIcon = [[UIImageView alloc] initWithImage:usernameImage]; usernameIcon.frame = CGRectMake(0, 0, 20, 20); self.textview = [[JSTextField alloc] initWithFrame:CGRectMake(0, 200, 240, 30) drawingLeft:usernameIcon]; self.textview.placeholder = @"用户名"; self.textview.borderStyle = UITextBorderStyleRoundedRect; self.textview.clearButtonMode = UITextFieldViewModeWhileEditing; //[self.textview setKeyboardType:UIKeyboardTypeNumbersAndPunctuation]; [self.view addSubview:self.textview];
textview的声明，在ViewController.h中：
代码：
@property (strong, nonatomic) IBOutlet JSTextField *textview;
效果如下：
标签：style blog http color io os ar 使用 for
原文地址：http://www.cnblogs.com/jiduoduo/p/4050934.html
