一.简介
NSImageView和iOS的UIImageView类似，只有添加手势时有些不一样。macOS中NSImageView没有userInteractionEnabled,不能添加gesture。
二.示例
要想给NSImageView添加手势有2种方式
需要创建一个子类集成
NSImageView，重写mouseDown、mouseUp等方法。// FSImageView.h
@interface FSImageView : NSImageView
@property (copy, nonatomic) void(^mouseDownBlock)(void);
@property (copy, nonatomic) void(^mouseUpBlock)(void);
@end
// FSImageView.m
@implementation FSImageView
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
}
- (void)mouseDown:(NSEvent *)event {
if (self.mouseDownBlock) {
self.mouseDownBlock();
}
}
- (void)mouseUp:(NSEvent *)event {
if (self.mouseUpBlock) {
self.mouseUpBlock();
}
}
@end
// ViewController.m
FSImageView *imgView = [[FSImageView alloc] initWithFrame:CGRectMake(10, 10, 200, 200)];
imgView.image = [NSImage imageNamed:@"avator"];
// 设置背景色
imgView.wantsLayer = YES;
imgView.layer.backgroundColor = NSColor.redColor.CGColor;
// 设置圆角
imgView.layer.cornerRadius = 100;
// 设置边框
imgView.layer.borderColor = NSColor.redColor.CGColor;
imgView.layer.borderWidth = 5;
// 添加手势
imgView.mouseDownBlock = ^{
// 按下
};
imgView.mouseUpBlock = ^{
// 抬起
};
[self.view addSubview:imgView];为
NSImageView添加手势NSGestureRecognizer// NSGestureRecognizer的子类来确定使用哪种手势
/*!
NSClickGestureRecognizer 单点
NSPanGestureRecognizer 拖动
NSMagnificationGestureRecognizer 放大
NSPressGestureRecognizer 按压
NSRotationGestureRecognizer 旋转
*/
FSImageView *imgView = [[FSImageView alloc] initWithFrame:CGRectMake(10, 10, 200, 200)];
imgView.image = [NSImage imageNamed:@"avator"];
// 设置背景色
imgView.wantsLayer = YES;
imgView.layer.backgroundColor = NSColor.redColor.CGColor;
// 设置圆角
imgView.layer.cornerRadius = 100;
// 设置边框
imgView.layer.borderColor = NSColor.redColor.CGColor;
imgView.layer.borderWidth = 5;
// 添加手势
NSClickGestureRecognizer *gesture = [[NSClickGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewClick:)];
[view addGestureRecognizer:gesture];
[self.view addSubview:imgView];
- (void)imageViewClick:(NSGestureRecognizer *)gesture {
NSLog(@"touch view");
}