NSTextView自动换行.m

//参考:
https://stackoverflow.com/questions/10463680/how-to-let-nstextfield-grow-with-the-text-in-auto-layout
//未看完:
https://stackoverflow.com/questions/24618703/automatically-wrap-nstextfield-using-auto-layout

//自定义视图

#import "YMTextField.h"

@implementation YMTextField

- (void)drawRect:(NSRect)dirtyRect {
    [super drawRect:dirtyRect];
    
    // Drawing code here.
}

//NSView 返回视图本身认为的内在内容大小。
-(NSSize)intrinsicContentSize
{
    if ( ![self.cell wraps] ) {
        return [super intrinsicContentSize];
    }
    
    NSRect frame = [self frame];
    
    CGFloat width = frame.size.width;
    
    //使框架非常高，同时保持宽度
    frame.size.height = CGFLOAT_MAX;
    
    // 计算框架内的新高度
    // 几乎无限的高度。
    CGFloat height = [self.cell cellSizeForBounds: frame].height;
    NSLog(@"%f,%f",width,height);
    return NSMakeSize(width, height);
}

// you need to invalidate the layout on text change, else it wouldn't grow by changing the text
- (void)textDidChange:(NSNotification *)notification
{
    [super textDidChange:notification];
    [self invalidateIntrinsicContentSize];
}
@end