自定义TextField的删除按钮
#import <UIKit/UIKit.h>
@interface CustomTextField : UITextField
@property(strong,nonatomic)NSString * alwaysShowStr;
@end
@interface CustomTextField ()
{
UIButton * _button;
}
@end
@implementation CustomTextField
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
- (void)drawRect:(CGRect)rect
{
// Drawing code
self.layer.borderWidth = 1.0;
self.layer.borderColor = [UIColor lightGrayColor].CGColor;
UIView * view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 20)];
self.leftView = view;
self.leftViewMode = UITextFieldViewModeAlways;
_button = [UIButton buttonWithType:UIButtonTypeCustom];
_button.frame = CGRectMake(0, 0, 40, 40);
[_button addTarget:self action:@selector(deleteSelfText) forControlEvents:UIControlEventTouchUpInside];
[_button setImage:[UIImage imageNamed:@"delete.png"] forState:UIControlStateNormal];
_button.imageEdgeInsets = UIEdgeInsetsMake(13,18,13,8);
UIView * rightView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
[rightView addSubview:_button];
self.rightView = rightView;
self.rightViewMode = UITextFieldViewModeAlways;
_button.hidden = YES;
[self addTarget:self action:@selector(textHadLength) forControlEvents:UIControlEventAllEvents];
}
-(void)deleteSelfText{
self.text = _alwaysShowStr;
if (!_alwaysShowStr) {
_button.hidden = YES;
}
}
-(void)textHadLength
{
if (self.text.length>=1) {
_button.hidden = NO;
}else{
_button.hidden = YES;
}
if (!self.editing) {
_button.hidden = YES;
}
}
-(CGRect)rightViewRectForBounds:(CGRect)bounds
{
return CGRectMake(self.width-40, 0, 40, 40);
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
@end
来源：https://www.cnblogs.com/tianlin106/p/3928686.html