- (void)viewDidLoad
{
[super viewDidLoad];
//建立在你已经遵守了<协议UITextFieldDelegate>
self.numTF.delegate = self;
self.passTF.delegate = self;
//密文显示
self.passTF.secureTextEntry = YES;
}
#pragma mark- UITextField事件监听
//当输入文本框将要开始编辑时
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
NSLog(@"单行输入文本框将要开始编辑时");
return YES;
}
//当输入文本框开始进入编辑模式时
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog(@"单行输入文本框开始编辑时");
}
//将要完成编辑时调用
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
NSLog(@"单行输入文本框将要完成编辑");
return YES;
}
//已经退出编辑模式时
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"已经退出编辑模式时调用");
//打印当前TextField的内容
NSLog(@"%@",textField.text);
//显示到TextLabel
self.textLabel.text = textField.text;
}
//当你按下键盘上的Return键时调用该方法
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
//选中当行输入文本框时,就改变第一消息响应者的身份。
[self.numTF resignFirstResponder];
[self.passTF resignFirstResponder];
return YES;
}
#pragma mark-字体换行
- (void)viewDidLoad
{
[super viewDidLoad];
//默认自动换行
self.myLabel.numberOfLines = 0;
//显示的内容
NSString *string = @"asdfaeatretgfdsgfdgsdgsdgfsdgsdfgsdfgerwtewrtywetyhwerghgfshw4tygwtrfg";
//显示的颜色
self.myLabel.backgroundColor = [UIColor redColor];
//显示出内容
self.myLabel.text = string;
//计算文本高度（字典）
NSDictionary *attribute = @{NSFontAttributeName: self.myLabel.font};
CGSize size = [string boundingRectWithSize:CGSizeMake(100, 0) options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attribute context:nil].size;
CGRect frame = self.myLabel.frame;
frame.size.height = size.height;
self.myLabel.frame = frame;
}