手势调整UITextView区域，字体不变_uitextview 长按不变色-优快云博客

本文介绍了通过手势识别和图形转换来实现以左上角为中心调整UITextView的区域，同时保持字体大小不变的技术方法。

方法: 手势识别+图形转换

Code：

    CGFloat _width=[self getPixCountWithmmL:40];
    CGFloat _height=[self getPixCountWithmmL:20];
    UITextView *_textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 20, _width, _height)];
    _textView.text = @"中国人";
    [_textView setBackgroundColor:[UIColor purpleColor]];
    
    
    UIView *_tmpview = [[UIView alloc] initWithFrame: CGRectMake(0, 50, 320, 500)];
    [_tmpview addSubview:_textView];
    [_tmpview setBackgroundColor:[UIColor lightGrayColor]];
    
    [self.view addSubview:_tmpview];
    self.centerPoint=_tmpview.center;
    
    [_tmpview setAutoresizingMask:UIViewAutoresizingFlexibleTopMargin];
    
    
    UIPinchGestureRecognizer *pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
    [_tmpview addGestureRecognizer:pinchGestureRecognizer];

- (void) handlePinch:(UIPinchGestureRecognizer*) recognizer
{
    NSLog(@"捏合, %f", recognizer.scale);

    recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
    
        recognizer.view.frame = CGRectMake(0, 50, recognizer.view.frame.size.width, recognizer.view.frame.size.height);

    
    recognizer.scale = 1;

}