iOS--TextField的小秘密

设置TextField左右视图

-(id)initWithFrame:(CGRect)frame drawingLeft:(UIImageView *)icon drawingRight:(UIButton *)bu{ 

 self = [super initWithFrame:frame];

if(self) { 

 self.leftView = icon; 

 self.leftViewMode = UITextFieldViewModeAlways;

 self.rightView= bu; 

 self.rightViewMode=UITextFieldViewModeAlways; 

 }

returnself;

}

-(CGRect)leftViewRectForBounds:(CGRect)bounds{ 

 CGRect iconRect = [super leftViewRectForBounds:bounds];

 iconRect.origin.x += 5;

// 右偏10returniconRect;

}

-(CGRect)rightViewRectForBounds:(CGRect)bounds{

 CGRect burect=[super rightViewRectForBounds:bounds];

 burect.origin.x +=-10;returnburect;

}

修改textFieldplaceholder字体颜色和大小

textField.placeholder = @"username is in here!"; 

[textFieldsetValue:[UIColor redColor]forKeyPath:@"_placeholderLabel.textColor"]; [textFieldsetValue:[UIFont boldSystemFontOfSize:16]forKeyPath:@"_placeholderLabel.font"];