objective-c - Xcode 8.0 beta 6，隐式转换丢失整数精度: 'NSInteger' (aka 'long' ) to 'CGSWindow' (aka 'int' )

Question

我似乎遇到了一些与 Xcode 8 beta 和 64 位迁移相关的成长烦恼。在搜索中，我发现了一些相关问题，但没有一个专门与解决“NSInteger”(又名“long”)到“CGSWindow”(又名“int”)错误相关的问题。

这里有人知道如何让它以正确的方式进行吗？

这是一个例子:

#import <Cocoa/Cocoa.h>

@interface CustomWindow : NSWindow {
    // this point is used in dragging to mark the initial click location
    NSPoint initialLocation;
}

@property (assign) NSPoint initialLocation;

@end


#import "CustomWindow.h"

#import <AppKit/AppKit.h>

@implementation CustomWindow

@synthesize initialLocation;

/*
 In Interface Builder, the class for the window is set to this subclass. Overriding the initializer
 provides a mechanism for controlling how objects of this class are created.
 */
- (id)initWithContentRect:(NSRect)contentRect
                styleMask:(NSUInteger)aStyle
                  backing:(NSBackingStoreType)bufferingType
                    defer:(BOOL)flag {

    // Using NSBorderlessWindowMask results in a window without a title bar.
    self = [super initWithContentRect:contentRect styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO];
    if (self != nil) {
        // Start with no transparency for all drawing into the window
        [self setAlphaValue:1.0];
        // Turn off opacity so that the parts of the window that are not drawn into are transparent.
        [self setOpaque:NO];
    }
    return self;
}

Answer 1

查看 NSWindow initWithContentRect:styleMask:backing:defer: 的文档。 styleMask 的类型是什么？参数？

- (instancetype)initWithContentRect:(NSRect)contentRect
                          styleMask:(NSWindowStyleMask)style
                            backing:(NSBackingStoreType)bufferingType
                              defer:(BOOL)flag;

所以你需要改变NSInteger至NSWindowStyleMask .

现在查看 NSWindowStyleMask 的文档。 NSBorderlessWindowMask不是列出的值之一(它是旧的、已弃用的值)。使用NSWindowStyleMaskBorderless .

所以你的代码应该是:

- (id)initWithContentRect:(NSRect)contentRect
                styleMask:(NSWindowStyleMask)aStyle
                  backing:(NSBackingStoreType)bufferingType
                    defer:(BOOL)flag {

    // Using NSBorderlessWindowMask results in a window without a title bar.
    self = [super initWithContentRect:contentRect styleMask: NSWindowStyleMaskBorderless backing:NSBackingStoreBuffered defer:NO];
    if (self != nil) {
        // Start with no transparency for all drawing into the window
        [self setAlphaValue:1.0];
        // Turn off opacity so that the parts of the window that are not drawn into are transparent.
        [self setOpaque:NO];
    }
    return self;
}