1.创建UIView
2.在UIView.h中创建两个属性
@property UILabel *aLabel;
@property UITextField *textField;
3.在UIView.m中重写初始化方法.创建新方法
//重写初始化方法
- (instancetype)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
[self setLabel];
[self setTextField];
}
return self;
}
//模块化创建label
//野指针 就是没有指向确定空间的指针
- (void)setLabel {
_aLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 10, 100, 40)];
_aLabel.backgroundColor = [UIColor brownColor];
_aLabel.textColor = [UIColor cyanColor];
[self addSubview:_aLabel];
}
- (void)setTextField{
_textField = [[UITextField alloc]initWithFrame:CGRectMake(130, 10, 250, 40)];
_textField.borderStyle = UITextBorderStyleRoundedRect;//默认白色
_textField.clearButtonMode = UITextFieldViewModeAlways;
[self addSubview:_textField];
}
4.在RootViewController.m的viewDidLoad中调用LTView
LTView *aView = [[LTView alloc]initWithFrame:CGRectMake(10, 50, 390, 60)];
aView.backgroundColor = [UIColor yellowColor];
aView.aLabel.text = @"账号";
aView.textField.placeholder = @"请输入账号";
[self.view addSubview:aView];
