ios - 格式指定类型 ‘int’ 但参数的类型为 ‘float’

Question

如果我将常量定义为整数，它如何被识别为 float ？

我在 Xcode 6.1.1 下构建并运行了下面的代码，没有出现任何问题。这个问题是在我升级到 Xcode 7.2 (7C68) 和 El Capitan 之后才出现的。

iOSCircleView.m

int   const SECTORS_80 = 80;


@implementation iOSCircleView

- (void)ViewSettings_OverView       {

    sectors = SECTORS_80;

        NSLog(@"sectors %i", sectors);
  } 

当我运行它时，NSLog 报告了一个警告

Format specifies type ‘int’ but the argument has type ‘float’

控制台显示

2016-01-07 10:05:00.210 AutoDrawUI[1298:555384] sectors 855670784

如果我将 NSLog 命令更改为

    NSLog(@"sectors %f”, sectors);

重新运行代码，没有警告但控制台显示

2016-01-07 10:38:01.547 AutoDrawUI[1330:632806] sectors 80.000000

这似乎是一个错误。但也许我错过了什么

这里是原始代码

int   const SECTORS_80          = 80;

@implementation iOSCircleView

// Initialisation

// frame a view for drawing

- (id)initWithFrame:(CGRect)frame   {
    self = [super initWithFrame:frame];
    if (self) {

        // Initialization code
        totalCircles            = [[NSMutableArray alloc] init];
        centre                  = [[NSMutableArray alloc] init];
        ring                    = [[NSMutableArray alloc] init];

        // Set background color
        self.backgroundColor    = [UIColor grayColor];

    }
    return self;
}

    // initialise single target view (7 others are commented out)

- (void)drawRect:(CGRect)rect       {

    [self ViewSettings_OverView];           // 1. "launch view" ??

} 

正在运行(注意:问题发生在它到达这里之前)

    // run

- (void)autoDrawUI                  {
        [self drawCircle];
}   

这是完整的类(class)(未经编辑)

     // initialise display settings

- (void)ViewSettings_OverView       {

    viewState = 0;
    // number of dots on perimeter
    sectors         = SECTORS_80;             // WARNING HERE
    limit           = sectors;;

    if (sectors <= 0) {                       // WARNING HERE

        show        = FALSE;                  // disable
    } else
        show        = TRUE;                   // enable perimeter dots

    // radius of large circle perimeter
    uberRadius      = UBERRADIUS_52;

    // radius of dots on large circle perimeter
    dotRadius       = DOTRADIUS_4;

    dotsFilled      = TRUE;                // outline
    oneColour       = TRUE;                // every colour
    alternateDots   = TRUE;                // alternately filled and coloured

    oddEvenState    = 1;                    // PlayView

    ringDot         = RINGDOT_HIDE;       //_SHOW104
    centreDotFilled = FALSE;                // fill or outline

    centreDot       = CENTREDOT_HIDE;       //CENTREDOT_SHOW26;
    centreDotFilled = TRUE;                 // fill or outline

        NSLog(@"View %i", viewState);
        NSLog(@"sectors %i", sectors);      // WARNING HERE
        NSLog(@"show %i", show);
    [self centreReference];

}

这是 .h 文件

    #import <UIKit/UIKit.h>

@interface iOSCircleView : UIView
{
    NSMutableArray  *totalCircles;
    NSMutableArray  *sectorDots;

    //                                      following Stackoverflow 08/02/2015 ?
    NSMutableArray  *centre;                // 1 of 5 (Global View), centre (Wait View), even bell icon (Play View)
    NSMutableArray  *ring;                  // odd bell icon (Play View)
                                            //      TO DO
    NSMutableArray  *sectorDotsCyan;        // 16 moons surround 1 of 5 buttons on Global View
    NSMutableArray  *sectorDotsRed;         // 16 moons          2
    NSMutableArray  *sectorDotsYellow;      // 16 moons          3
    NSMutableArray  *sectorDotsMagenta;     // 16 moons          4
    NSMutableArray  *sectorDotsGreen;       // 16 moons          5

    int             dotCount,               // working
                    colourIndex,            // working
                    toggleIndex,            // working
                    imageIndex,
                    limit,                  // working
                    selectedZone,           // working
                    selectedPhone,
                    selectedState,
                    state,
                    viewState,              // working
                    ringDotFilled,
                    centreDotFilled,        // working
                    dotsFilled,             // working
                    labelShown,
                    oneColour,              // working
                    alternateDots,
                    i,                      // working
                    show;                   // working

    BOOL            shakeTap,               // PlayView
                    oddEvenPhone,           // LocalView
                    oddEvenState;           // working

    float           uberX,                  // working
                    uberY,                  // working
                    uberRadius,             // working
                    uberAngle,              // working
                    labelX,
                    labelY,
                    dotRadius,              // working
                    sectors,                // working
                    x,                      // working
                    y,                      // working
                    ringDot,                // working
                    centreDot,              // working
                    textOffset,             // working
                    startAngle,
                    dotAngle,
                    endAngle,
                    angle;

    CGPoint         dotPosition;
    CGRect          boxBoundary;
    CGContextRef    context;
}

@property(nonatomic,retain) UIColor* fillColor;
@property(nonatomic,retain) UIColor* circle;
@property(nonatomic,retain) UIImage* anImage;


- (void)drawCircle;
- (void)drawRosette;

@end

...问题立即变得显而易见。我将扇区声明为 float 的，不知何故我以前是如何逃脱的。我的大脑还在度假!

Answer 1

您的问题与 SECTORS_80 无关。这都是关于 sectors 变量的，因为这是您正在记录的变量。您没有指定它是如何声明的，但显然错误表明您将其声明为 float。

改变:

float sectors;

到:

int sectors;

或更改格式以使用 %f。无论哪种方式都会消除错误。但只有一个才是真正合适的，具体取决于您的需要。